GS Mortgage Securities 

T

rust 2015-GC34

 Commercial Mortgage Pass-Through Certificates, Series 2015-GC34

May 2026

D

A

TES

 ADMINISTR

A

TOR

Payment 

Date:

Prior 

Payment:

Next 

Payment:

Record Date:

Determination Date:

May

12,

2026

Apr

10,

2026

Jun

12,

2026

Apr 30, 2026

May 06, 2026

First Payment Date:

Closing Date:

Rated Final Distribution Date:

Nov 13, 2015

Oct 23, 2015

Oct 13, 2048

Name:

Edward Przybycien

Title:

Account Administrator

Phone:

312.327.7535

T

ABLE OF CONTENTS

Distribution Date Report

Page

1

Email:

edward.przybycien@usbank.com

Website:

https://pivot.usbank.com/

Payment Detail (Exchange Certificates)

Factor Detail

Principal Detail

Interest Detail

Reconciliation of Funds

Additional Loan Detail

Historical Loan Modification Report

Bond/Collateral Realized Loss Reconciliation

Historical Delinquency & Liquidation (Stated)

REO Additional Detail

REO Status Report

Historical Liquidation Loss Loan Detail

Interest Adjustment Reconciliation

Appraisal Reduction Report

Loan Level Detail

Material Breaches and Document Defects

Mortgage Loan Characteristics

Delinquent Loan Detail

Supplemental Information

Page

2

Page

3

Page

4

Page

5

Page

6

Page

7

Page

9

Page

10

Page

12

Page

13

Page

14

Page

15

Page

16

Page

17

Page

18

Page

20

Page

21

Page

25

Page

26

P

ARTIES TO THE TRANSACTION

Sponsor:

Cantor Commercial Real Estate Lending, L.P.

Sponsor:

Citigroup Global Markets Realty Corp.

Sponsor:

Goldman Sachs Mortgage Company

Sponsor:

MC-Five Mile Commercial Mortgage Finance LLC

Sponsor:

Starwood Mortgage Funding I LLC

Depositor:

GS Mortgage Securities Corporation II

Trustee:

U.S. Bank

Certificate Administrator:

U.S. Bank

Custodian:

U.S. Bank

Master Servicer:

Trimont LLC

Special Servicer:

LNR Partners, LLC

Operating Advisor:

Pentalpha Surveillance LLC

* This report contains, or is based on, information furnished to U.S.

Bank Global Corporate Trust ("U.S. Bank") by one or more third parties (e.g. Servicers, Master Servicer, etc.), and U.S. Bank

has not independently verified information received from any such third party.

GS Mortgage Securities 

T

rust 2015-GC34

 Commercial Mortgage Pass-Through Certificates, Series 2015-GC34

May 2026

DISTRIBUTION D

A

TE REPORT

Effective

Pass-Through

Class

Rate

A-1

1.53900%

A-2

2.07500%

A-3

3.24400%

A-4

3.50600%

A-AB

3.27800%

X-A

0.63437%

X-B

0.07937%

A-S

3.91100%

B

4.46600%

PEZ

N/A

C

4.54537%

D

2.97900%

X-D

1.56637%

E

4.54537%

F

4.54537%

G

4.54537%

S

0.00000%

R

0.00000%

Original

Balance

30,283,000.00

28,822,000.00

185,000,000.00

284,382,000.00

65,382,000.00

634,167,000.00

48,782,000.00

40,298,000.00

48,782,000.00

0.00

42,419,000.00

51,964,000.00

51,964,000.00

23,331,000.00

8,483,000.00

39,238,739.00

0.00

0.00

Beginning

Balance (1)

0.00

0.00

0.00

0.00

0.00

25,675,762.05

48,782,000.00

25,675,762.05

48,782,000.00

0.00

42,419,000.00

51,964,000.00

51,964,000.00

23,331,000.00

8,483,000.00

16,615,490.42

0.00

0.00

Principal

Distribution

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

Interest

Distribution (2)

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

Total

Distribution

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

Realized

Loss

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

Ending

Balance

0.00

0.00

0.00

0.00

0.00

25,675,762.05

48,782,000.00

25,675,762.05

48,782,000.00

0.00

42,419,000.00

51,964,000.00

51,964,000.00

23,331,000.00

8,483,000.00

16,615,490.42

0.00

0.00

Exchangeable

Percent

Outstanding

100.00000%

100.00000%

100.00000%

Totals:

848,384,739.00

217,270,252.47

0.00

0.00

0.00

0.00

217,270,252.47

(1) The Class PEZ Certificates have an initial maximum certificate principal amount of 131,499,000.00.

(2) Class S is a sole beneficiary of Excess Interest.

Page 1 of 26

GS Mortgage Securities 

T

rust 2015-GC34

 Commercial Mortgage Pass-Through Certificates, Series 2015-GC34

May 2026

PA

YMENT DE

T

AIL (EXCHANGE CERTIFIC

A

TES)

Pass-Through

Class

Rate

A-S

3.911000%

B

4.466000%

PEZ

N/A

C

4.545370%

Original

Balance

40,298,000.00

48,782,000.00

0.00

42,419,000.00

Beginning

Balance

25,675,762.05

48,782,000.00

0.00

42,419,000.00

Principal

Distribution

0.00

0.00

0.00

0.00

Interest

Distribution

0.00

0.00

0.00

0.00

Total

Distribution

0.00

0.00

0.00

0.00

Realized

Loss

0.00

0.00

0.00

0.00

Ending

Balance

25,675,762.05

48,782,000.00

0.00

42,419,000.00

Percent

Exchanged

0.00000%

0.00000%

0.00000%

Totals:

131,499,000.00

116,876,762.05

0.00

0.00

0.00

0.00

116,876,762.05

Page 2 of 26

GS Mortgage Securities 

T

rust 2015-GC34

 Commercial Mortgage Pass-Through Certificates, Series 2015-GC34

May 2026

F

ACTOR DE

T

AIL

Class

CUSIP

A-1

36250VAA0

A-2

36250VAB8

A-3

36250VAC6

A-4

36250VAD4

A-AB

36250VAE2

X-A

36250VAF9

X-B

36250VAG7

A-S

36250VAH5

B

36250VAJ1

PEZ

36250VAK8

C

36250VAL6

D

36250VAM4

X-D

36250VAN2

E

36250VAP7

F

36250VAR3

G

36250VAT9

S

36250VAV4

R

36250VAX0

Beginning

Balance

0.00000000

0.00000000

0.00000000

0.00000000

0.00000000

40.48738275

1000.00000000

637.14730392

1000.00000000

0.00000000

1000.00000000

1000.00000000

1000.00000000

1000.00000000

1000.00000000

423.44608517

0.00000000

0.00000000

Principal

Distribution

0.00000000

0.00000000

0.00000000

0.00000000

0.00000000

0.00000000

0.00000000

0.00000000

0.00000000

0.00000000

0.00000000

0.00000000

0.00000000

0.00000000

0.00000000

0.00000000

0.00000000

0.00000000

Interest

Distribution

0.00000000

0.00000000

0.00000000

0.00000000

0.00000000

0.00000000

0.00000000

0.00000000

0.00000000

0.00000000

0.00000000

0.00000000

0.00000000

0.00000000

0.00000000

0.00000000

0.00000000

0.00000000

Total

Distribution

0.00000000

0.00000000

0.00000000

0.00000000

0.00000000

0.00000000

0.00000000

0.00000000

0.00000000

0.00000000

0.00000000

0.00000000

0.00000000

0.00000000

0.00000000

0.00000000

0.00000000

0.00000000

Realized

Loss

0.00000000

0.00000000

0.00000000

0.00000000

0.00000000

0.00000000

0.00000000

0.00000000

0.00000000

0.00000000

0.00000000

0.00000000

0.00000000

0.00000000

0.00000000

0.00000000

0.00000000

0.00000000

Ending

Balance

0.00000000

0.00000000

0.00000000

0.00000000

0.00000000

40.48738275

1000.00000000

637.14730392

1000.00000000

0.00000000

1000.00000000

1000.00000000

1000.00000000

1000.00000000

1000.00000000

423.44608517

0.00000000

0.00000000

Page 3 of 26

GS Mortgage Securities 

T

rust 2015-GC34

 Commercial Mortgage Pass-Through Certificates, Series 2015-GC34

May 2026

PRINCI

P

AL DE

T

AIL

Class

A-1

A-2

A-3

A-4

A-AB

A-S

B

PEZ

C

D

E

F

G

Totals:

Beginning

Balance

0.00

0.00

0.00

0.00

0.00

25,675,762.05

48,782,000.00

0.00

42,419,000.00

51,964,000.00

23,331,000.00

8,483,000.00

16,615,490.42

217,270,252.47

Scheduled

Principal

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

Unscheduled

Principal

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

Realized

Loss

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

Operating

Advisor

Expenses

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

Ending

Balance

0.00

0.00

0.00

0.00

0.00

25,675,762.05

48,782,000.00

0.00

42,419,000.00

51,964,000.00

23,331,000.00

8,483,000.00

16,615,490.42

217,270,252.47

Cumulative

Realized

Loss

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

22,623,248.58

22,623,248.58

Page 4 of 26

GS Mortgage Securities 

T

rust 2015-GC34

 Commercial Mortgage Pass-Through Certificates, Series 2015-GC34

May 2026

INTEREST DE

T

AIL

Class

A-1

A-2

A-3

A-4

A-AB

X-A

X-B

A-S

B

PEZ

C

D

X-D

E

F

G

S

R

Totals:

Accrued

Certificate

Interest

0.00

0.00

0.00

0.00

0.00

13,573.28

3,226.53

83,681.59

181,550.34

0.00

160,675.05

129,000.63

67,829.05

88,373.36

32,131.98

62,936.30

0.00

0.00

822,978.10

Net Prepay

Interest

Shortfall

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

Interest

Adjustment

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

8,120.60

0.00

8,876.99

7,821.14

6,902.18

9,025.03

3,435.20

24,399.44

0.00

0.00

68,580.58

Current

Interest

Shortfalls

0.00

0.00

0.00

0.00

0.00

13,573.28

3,226.53

83,681.59

181,550.34

0.00

160,675.05

129,000.63

67,829.05

88,373.36

32,131.98

62,936.30

0.00

0.00

822,978.10

Yield

Maintenance

Charges

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

Total Interest

Distribution

Amount

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

Cumulative

Unpaid Interest

Shortfall

0.00

0.00

0.00

0.00

0.00

13,573.28

3,226.53

83,681.59

2,371,649.98

0.00

2,513,120.57

3,287,330.01

1,896,940.23

2,480,050.86

942,477.82

6,528,908.02

0.00

0.00

20,120,958.89

Page 5 of 26

GS Mortgage Securities 

T

rust 2015-GC34

 Commercial Mortgage Pass-Through Certificates, Series 2015-GC34

May 2026

RECONCILI

A

TION OF FUNDS

Funds Collection

Interest

Scheduled Interest

0.00

Funds Distribution

Fees

Master Servicing Fee

0.00

Interest Adjustments

0.00

Deferred Interest

0.00

Net Prepayment Shortfall

0.00

Net Prepayment Interest Excess

0.00

Interest Reserve (Deposit)/Withdrawal

0.00

Interest Collections

0.00

Principal

Scheduled Principal

0.00

Unscheduled Principal

0.00

Principal Adjustments

0.00

Principal Collections

0.00

Other

Yield Maintenance

0.00

Excess Interest

0.00

Excess Liquidatation Proceeds

0.00

Other Collections

0.00

Total Collections

0.00

Trustee/Certificate Administrator Fees

CREFC Intellectual Property  Royalty License Fee

Operating Advisor Fee

Special Servicing Fee

Workout Fee

Liquidation Fee

Special Serv Fee plus Adj.

Miscellaneous Fee

Fee Distributions

Additional Trust Fund Expenses

Reimbursed for Interest on Advances

Net ASER Amount

Non-Recoverable Advances

Other Expenses or Shortfalls

Additional Trust Fund Expenses

Payments to Certificateholders

Interest Distribution

Principal Distribution

Yield Maintenance

Excess Interest

Payments to Certificateholders

Total Distribution

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

823,720.44

823,720.44

0.00

0.00

0.00

0.00

0.00

0.00

Page 6 of 26

GS Mortgage Securities 

T

rust 2015-GC34

 Commercial Mortgage Pass-Through Certificates, Series 2015-GC34

May 2026

ADDITIONAL LOAN DE

T

AIL

Mortgage Loan Stated Principal Balance

Beginning Principal Balance

Ending Principal Balance

% of Cut-Off Date Principal Balance

Ending Loan Count

Weighted Average Remaining Term to Maturity

Weighted Average Mortgage Rate

Controlling Class:

Controlling Class Representative:

Control Terminiation Event:

217,270,252.45

217,270,252.45

25.61%

5

1

4.5562702%

E

N/A

YES

P&I Advances:

P & I Advances

Miscellaneous Advances

Outstanding P & I Advances

Disclosable Special Servicer Fees

Commission

Brokerage Fee

Rebate

Shared Fee

Other

Excess Liquidation Proceeds Account

Beg Balance

0.00

Total

Not Provided

Not Provided

0.00

0.00

0.00

0.00

0.00

0.00

(Withdraw)/Dep

0.00

End Balance

0.00

Specially Serviced Loans that are not Delinquent

Count

Balance

0

0.00

Aggregate Realized Loss in Related Collection Period

0.00

Agg Add’l Trust Expenses in Related Collection Period

0.00

Page 7 of 26

GS Mortgage Securities 

T

rust 2015-GC34

 Commercial Mortgage Pass-Through Certificates, Series 2015-GC34

May 2026

ADDITIONAL LOAN DE

T

AIL

Mortgage Loans As to Which Related Mortgator

Is Subject Or Is Expected To Bankruptcy Proceedings

Mortgage Loan Repurchased, Substituted For Or Otherwise

Liquidated Or Disposed During Related Collection Period

Stated Principal

Count

Balance

0

0.00

Amount Of Any

Loan ID

Liq Proceeds

0.00

Portion Included

in Avail Funds

0.00

Totals:

0

0.00

Totals:

0.00

0.00

Page 8 of 26

GS Mortgage Securities 

T

rust 2015-GC34

 Commercial Mortgage Pass-Through Certificates, Series 2015-GC34

May 2026

HISTORICAL LOAN MODIFIC

A

TION REPORT

Loan ID

2

Ending

Scheduled

Balance

 79,858,200.63

Ending

 Unpaid

 Balance

 80,823,622.57

Comments

 Please see Loan Modification Report on Trustee website.

Page 9 of 26

GS Mortgage Securities 

T

rust 2015-GC34

 Commercial Mortgage Pass-Through Certificates, Series 2015-GC34

May 2026

BOND/COLL

A

TERAL REALIZED LOSS RECONCILI

A

TION

Loan ID

Period

Jul 2025

Jul 2025

Apr 2026

Nov 2021

Jan 2022

Feb 2022

Mar 2022

Apr 2022

Jun 2022

Jul 2022

Aug 2022

Sep 2022

Oct 2022

Nov 2022

Jul 2025

Oct 2025

Dec 2025

Feb 2026

Mar 2026

Apr 2026

Nov 2020

Apr 2021

Oct 2022

Jun 2023

Apr 2026

Apr 2023

Jun 2023

Jul 2023

Sep 2023

Oct 2023

Beginning

Balance of the

Loan at

Liquidation

 12,998,945.04

 12,417,971.55

 10,719,451.89

 3,260,105.76

Aggregate

Realized Loss

on Loans

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 2,140,818.61

 2,137,677.80

 0.00

 1,020.00

 0.00

 1,605,578.93

 1,591,985.59

 1,592,682.41

 1,588,134.54

 1,588,254.54

Prior Realized

Loss Applied to

Certificates

A

 0.00

 0.00

 10,614,965.69

 0.00

 850,000.00

 599,286.40

 463,927.45

 180,359.17

 38,575.03

(244,993.25)

(386,777.39)

(528,561.53)

(670,345.67)

(812,129.81)

 0.00

 2,044,149.92

 1,868,164.76

 1,860,644.97

 1,504,312.31

 0.00

 0.00

 2,140,818.61

 0.00

 0.00

 0.00

 0.00

 1,605,578.93

 1,591,985.59

 1,592,682.41

 1,588,134.54

Amounts

Covered by

Overcollateraliz

ation and other

Credit Support

B

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

Interest

(Shortages) /

Excesses

applied to

Realized Loss

C

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

Modification

Adjustments /

Appraisal

Reduction

Adjustment

D

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

Additional

(Recoveries) /

Expenses

applied to

Realized Loss

E

 5,014,249.68

 10,614,965.69

 233,

1

16.74

 850,000.00

(250,713.60)

(135,358.95)

(283,568.28)

(141,784.14)

(283,568.28)

(141,784.14)

(141,784.14)

(141,784.14)

(141,784.14)

(75,587.75)

 2,044,149.92

(175,985.16)

(7,519.79)

(356,332.66)

(1

1,399.92)

 0.00

 0.00

(3,140.81)

 0.00

 1,020.00

 640,448.12

 0.00

(13,593.34)

 696.82

(4,547.87)

 120.00

Current

Realized Loss

Applied to

Certificates*

 5,014,249.68

 10,614,965.69

 10,848,082.43

 850,000.00

 599,286.40

 463,927.45

 180,359.17

 38,575.03

(244,993.25)

(386,777.39)

(528,561.53)

(670,345.67)

(812,129.81)

(887,717.56)

 2,044,149.92

 1,868,164.76

 1,860,644.97

 1,504,312.31

 1,492,912.39

 0.00

 2,140,818.61

 2,137,677.80

 0.00

 1,020.00

 640,448.12

 1,605,578.93

 1,591,985.59

 1,592,682.41

 1,588,134.54

 1,588,254.54

Recoveries of

Realized

Losses paid

as Cash

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

(Recoveries) /

Loss to

Certificate

Interest

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

Page 10 of 26

GS Mortgage Securities 

T

rust 2015-GC34

 Commercial Mortgage Pass-Through Certificates, Series 2015-GC34

May 2026

BOND/COLL

A

TERAL REALIZED LOSS RECONCILI

A

TION

Loan ID

47

51

Loan Count:

Period

Mar 2024

Apr 2026

10

Beginning

Balance of the

Loan at

Liquidation

 3,013,889.94

Totals:

Aggregate

Realized Loss

on Loans

 1,586,816.78

 0.00

 3,725,514.58

Prior Realized

Loss Applied to

Certificates

A

 1,588,254.54

 0.00

Amounts

Covered by

Overcollateraliz

ation and other

Credit Support

B

 0.00

 0.00

 0.00

Interest

(Shortages) /

Excesses

applied to

Realized Loss

C

 0.00

 0.00

 0.00

Modification

Adjustments /

Appraisal

Reduction

Adjustment

D

 0.00

 0.00

 0.00

Additional

(Recoveries) /

Expenses

applied to

Realized Loss

E

(1,437.76)

 0.00

 17,087,092.10

Current

Realized Loss

Applied to

Certificates*

 1,586,816.78

 0.00

 20,833,489.64

Recoveries of

Realized

Losses paid

as Cash

 0.00

 0.00

 0.00

(Recoveries) /

Loss to

Certificate

Interest

 0.00

 0.00

 0.00

Description of Fields

A

B

C

D

E

*In the Initial Period the Current Realized Loss Applied to Certificates will equal Aggregate Realized Loss on Loans

- B - C - D  + E instead of A - C - D +  E

Prior Realized Loss Applied to Certificates

Reduction to Realized Loss applied to bonds (could represent OC, insurance policies, reserve accounts, etc)

Amounts classified by the Master as interest adjustments from general collections on a loan with a Realized Loss

Adjustments that are based on principal haircut or future interest foregone due to modification

Realized Loss Adjustments, Supplemental Recoveries or Expenses on a previously liquidated loan

Page 11 of 26

GS Mortgage Securities 

T

rust 2015-GC34

 Commercial Mortgage Pass-Through Certificates, Series 2015-GC34

May 2026

HISTORICAL DELINQUENCY & LIQUID

A

TION SUMMARY (S

TA

TED BALANCE)

30 Days Delinq

(1)

60 Days Delinq

(1)

90+ Days Delinq

(1)

Bankruptcy

Foreclosure

REO

Prepayments/Liquidation

Month

Count

Balance

%

(2)

Count

Balance

%

(2)

Count

Balance

%

(2)

Count

Balance

%

(2)

Count

Balance  

%

(2)

Count

Balance

%

(2)

Count

Balance

%

(2)

May 2026

0

Apr 2026

1

 0.00 

0.0

%

1

 17,713,593.77 

8.2

%

0

 17,713,593.77 

8.2

%

2

 0.00 

0.0

%

2

 98,981,903.39

 98,981,903.39

45.6

%

0

45.6

%

0

 0.00 

0.0

%

0

 0.00 

0.0

%

0

 0.00 

0.0

%

2

 0.00 

0.0

%

2

 100,574,755.29

46.3

%

0

 100,574,755.29

46.3

%

2

 0.00 

0.0%

 16,012,834.98 

7.4%

Mar 2026

0

Feb 2026

0

 0.00 

0.0

%

0

 0.00 

0.0

%

0

 0.00 

0.0

%

5

 0.00 

0.0

%

5

 194,852,939.00

 194,861,043.18

83.5

%

0

83.5

%

0

 0.00 

0.0

%

0

 0.00 

0.0

%

0

 0.00 

0.0

%

1

 0.00 

0.0

%

1

 20,716,554.66 

8.9

%

0

 20,716,554.66 

8.9

%

0

 0.00 

0.0%

 0.00 

0.0%

Jan 2026

0

 0.00 

0.0

%

1

 23,837,567.99

10.0

%

5

 194,867,840.63

81.4

%

0

 0.00 

0.0

%

0

 0.00 

0.0

%

1

 20,716,554.66 

8.7

%

0

 0.00 

0.0%

Dec 2025

0

Nov 2025

1

 0.00 

0.0

%

1

 3,042,724.68 

1.3

%

1

 3,035,559.47 

1.3

%

5

 13,025,799.06 

5.4

%

4

 215,676,617.05

 202,739,232.46

90.1

%

0

84.6

%

0

 0.00 

0.0

%

0

 0.00 

0.0

%

0

 0.00 

0.0

%

1

 0.00 

0.0

%

1

 20,716,554.66 

8.7

%

0

 20,716,554.66 

8.6

%

1

 0.00 

0.0%

 2,036,645.21 

0.9%

Oct 2025

1

Sep 2025

1

Aug 2025

0

Jul 2025

0

Jun 2025

0

 13,050,927.86 

5.4

%

1

 23,982,551.30 

6.9

%

0

 0.00 

0.0

%

0

 0.00 

0.0

%

1

 0.00 

0.0

%

0

 23,933,407.09 

9.9

%

3

 0.00 

0.0

%

3

 0.00 

0.0

%

3

 6,913,398.61 

1.4

%

2

 0.00 

0.0

%

3

 178,863,288.68

 178,875,257.37

 178,886,291.74

 171,983,883.49

 178,909,1

19.57

74.0

%

0

51.4

%

0

44.0

%

0

34.1

%

0

30.8

%

0

 0.00 

0.0

%

0

 0.00 

0.0

%

0

 0.00 

0.0

%

0

 0.00 

0.0

%

0

 0.00 

0.0

%

0

 0.00 

0.0

%

1

 0.00 

0.0

%

1

 0.00 

0.0

%

1

 0.00 

0.0

%

1

 0.00 

0.0

%

1

 20,716,554.66

 20,716,554.66

 20,716,554.66

 20,716,554.66

 20,716,554.66

8.6

%

5

6.0

%

7

5.1

%

6

4.1

%

9

3.6

%

1

1

 106,

1

16,002.91

43.9%

 58,862,786.33

16.9%

 96,974,493.63

23.8%

 75,654,583.93

15.0%

 107,064,966.25

18.5%

May 2025

0

Apr 2025

0

Mar 2025

0

 0.00 

0.0

%

0

 0.00 

0.0

%

1

 0.00 

0.0

%

1

 0.00 

0.0

%

3

 6,947,885.1

1

1.0

%

2

 6,958,694.10 

1.0

%

2

 178,920,018.89

 171,983,883.49

 172,133,103.79

26.0

%

0

24.4

%

0

24.3

%

0

 0.00 

0.0

%

0

 0.00 

0.0

%

0

 0.00 

0.0

%

0

 0.00 

0.0

%

1

 0.00 

0.0

%

1

 0.00 

0.0

%

1

 20,716,554.66 

3.0

%

4

 20,755,556.50 

2.9

%

1

 20,791,599.43 

2.9

%

0

 17,339,740.59 

2.5%

 2,276,642.98 

0.3%

 0.00 

0.0%

(1) Exclusive of loans in Bankruptcy, Foreclosure and REO

(2) Percentage in relation to Ending Scheduled Balance

Page 12 of 26

GS Mortgage Securities 

T

rust 2015-GC34

 Commercial Mortgage Pass-Through Certificates, Series 2015-GC34

May 2026

REO ADDITIONAL DE

T

AIL

Mortgage Property That Became REO Property During Related Prepayment Period

Stated Principal

Loan ID

Balance

Unpaid Principal

Balance

Most Recent

Appraisal Value

Date Appraisal

Performed

Totals:

$0.00

$0.00

$0.00

Page 13 of 26

GS Mortgage Securities 

T

rust 2015-GC34

 Commercial Mortgage Pass-Through Certificates, Series 2015-GC34

May 2026

REO S

TA

TUS REPORT

Ending

Loan ID

State

City

Property Type

Book Value

Scheduled Loan 

REO Date

Appraisal

Total Exposure

Appraisal Value

Date

Date Asset

Expected to

be Resolved

or Foreclosed

REO Revenue

and Other

Amounts

Type *

2

NY

10

NY

47

GA

Count:

3

New

Y

ork

V

arious

Lithonia

Totals:

Mixed Use

V

arious

Retail

 84,500,000.00

 23,300,000.00

 4,000,000.00

11

1,800,000.00

 79,858,200.63

 20,716,554.66

 0.00

 100,574,755.29

03/10/2026

09/29/2022

05/03/2022

 80,050,186.33

 23,842,325.1

1

 0.00

 103,892,51

1.44

 39,000,000.00

1

1,100,000.00

 0.00

 50,100,000.00

01/01/2026

1

1/24/2025

12/31/2026

12/31/2026

 21,125,282.00

 0.00

 0.00 

3

 21,125,282.00

(*) Legend: (1) Partial Liq’n (Curtailment), (2) Payoff Prior T

o Maturity, (3) Disposition / Liquidation, (4) Repurchase/ Substitution, (5) Full Payoff At Maturity, (6) DPO, (7) Liquidated, (8) Payoff w/ penalty,

(9) Payoff w/ yield Maintenance, (10) Curtailment w/ Penalty, (11) Curtailment w/ Yield Maintenance

Page 14 of 26

GS Mortgage Securities 

T

rust 2015-GC34

 Commercial Mortgage Pass-Through Certificates, Series 2015-GC34

May 2026

HISTORICAL LIQUID

A

TION LOSS LOAN DE

T

AIL

Loan ID

15

17

23

47

51

Liquidation

Month

Apr 2026

Nov 2020

Oct 2022

Apr 2023

Apr 2026

Liquidation /

Prepayment

Code *

3

3

3

3

3

Current Beginning

Scheduled Balance

 12,998,945.04

 12,417,971.55

 10,719,451.89

 3,260,105.76

 3,013,889.94

Most Recent Value **

 12,200,000.00

 25,300,000.00

 8,690,000.00

 2,350,000.00

 7,800,000.00

Net Proceeds Received

on Liquidation

 14,790,672.40

 10,803,710.20

 13,502,986.35

 2,393,310.51

 3,658,043.49

Liquidation Expense

 708,424.89

 523,416.45

 2,784,554.46

 720,021.53

 212,550.80

Net Proceeds Available

for Distribution

 14,082,247.51

 10,280,293.75

 10,718,431.89

 1,673,288.98

 3,445,492.69

Realized Loss to Trust

 0.00

 2,137,677.80

 1,020.00

 1,586,816.78

 0.00

Count:

5

Totals:

 42,410,364.18 

 56,340,000.00 

 45,148,722.95 

 4,948,968.13 

 40,199,754.82 

 3,725,514.58

* Liquidation / Prepayment Code:  1 - Partial Liq’n (Curtailment); 2 -

Payoff Prior 

T

o Maturity; 3 - Disposition / Liquidation; 4 - Repurchase/ Substitution; 5 -

Full Payoff At Maturity; 6 - DPO; 7 - Liquidated; 8 -

Payoff w/ penalty; 9 - Payoff w/ yield Maintenance; 10 - Curtailment w/ Penalty;

11 - Curtailment w/ Yield Maintenance

** Reported as of liquidation period.  If not provided by the servicer,

Most Recent V

alue is as of cutoff

.

Page 15 of 26

GS Mortgage Securities 

T

rust 2015-GC34

 Commercial Mortgage Pass-Through Certificates, Series 2015-GC34

May 2026

INTEREST ADJUSTMENT RECONCILI

A

TION

Current Ending

Scheduled

Loan ID

Balance

Special

Servicing Fee

Amount plus

Adjustments

Liquidation

Fee Amount

Workout Fee

Amount

Most Recent

Net ASER

Amount

Prepayment

Interest

(Excess)/

Shortfall *

Non-

Recoverable

(Scheduled

Interest Not

Advanced)**

Reimbursed

Interest on

Advances

Modified

Interest Rate

Reduction/

(Excess)

Reimbursement of

Advances to Servicer

Current Month

Outstanding

Other

Shortfalls/

(Refunds)

1

2

7

10

31

Count:

Totals:

 92,125,682.86

 0.00

 0.00

 79,858,200.63

 0.00

 0.00

 17,713,593.77

 0.00

 0.00

 20,716,554.66

 0.00

 0.00

 6,856,220.53

 0.00

 0.00

5

 217,270,252.45

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 344,565.40

 0.00

 302,343.16

 0.00

 66,325.60

 0.00

 83,957.29

 0.00

 26,528.99

 0.00

 823,720.44

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

 0.00

Total Interest Shortfall hitting the Trust:

 823,720.44

*

T

otal shortfall may not match impact to bonds due to, but not limited to, the net effect of PPIE and Master Servicing fees received as per the governing documents.

**In some cases, the Servicer does not withhold their Servicing Fees on Non-Recoverable loans.

Page 16 of 26

GS Mortgage Securities 

T

rust 2015-GC34

 Commercial Mortgage Pass-Through Certificates, Series 2015-GC34

May 2026

APPRAISAL REDUCTION REPORT

Loan ID

Property Name

1

2

7

10

31

Paid Through

Date

05/06/2024

07/06/2023

02/06/2026

09/06/2022

04/06/2025

ARA (Appraisal

Reduction Amount)

71,

1

13,320.40

 71,459,741.97

 3,645,696.29

 15,756,454.82

 2,800,338.44

ARA Date

03/06/2026

02/06/2026

04/06/2026

01/06/2026

05/06/2026

Most Recent Value

 85,700,000.00

 39,000,000.00

 14,500,000.00

1

1,100,000.00

 5,300,000.00

Most Recent

Valuation Date

06/19/2024

01/01/2026

12/10/2025

1

1/24/2025

1

1/17/2025

Most Recent Net

ASER Amount

 0.00

 0.00

 0.00

 0.00

 0.00

Cumulative ASER

Amount

 798,853.97

 151,712.93

 22,369.25

 3,125,562.45

 20,228.81

Count:

5

Totals:

 164,775,551.92

 155,600,000.00

 0.00

$4,1

18,727.41

Page 17 of 26

GS Mortgage Securities 

T

rust 2015-GC34

 Commercial Mortgage Pass-Through Certificates, Series 2015-GC34

May 2026

LOAN LEVEL DE

T

AIL

Property

Transfer

Maturity

Neg

End Schedule 

Note

Sched

Prepay

Prepay

Paid 

Prepay

Loan

Interest

Yield Maint 

PFY

Operating

Loan ID

Type

Date

Stat

Date

Am

Balance

Rate

P&I

Adj

Date

Thru

Premium

Status **

Payment

Charges

DSCR

Stmnt

1

Office

04/25/24

IL

08/06/25

N

 92,125,682.86

 4.495

 0.00

 0.00

05/06/24

 0.00

5

 0.00

 0.00

 0.24

12/31/25

2

Mixed Use

10/17/23

NY

10/06/25

N

 79,858,200.63

 4.550

 0.00

 0.00

07/06/23

 0.00

5

 0.00

 0.00

 0.06

12/31/24

3

Lodging

4

Mixed Use

5

Office

6

Retail

XX

09/06/25

TX

10/06/25

NY

10/06/25

TX

09/06/25

08/06/25

09/29/25

09/18/25

09/05/25

7

Retail

08/20/25

XX

08/06/25

N

 17,713,593.77

 4.500

 0.00

 0.00

02/06/26

 0.00

5

 0.00

 0.00

 1.13

12/31/25

8

Multifamily

9

Retail

P

A

09/06/25

OH

09/06/25

06/06/25

06/06/25

10

V

arious

12/23/19

NY

09/06/25

N

 20,716,554.66

 4.870

 0.00

 0.00

09/06/22

 0.00

5

 0.00

 0.00

 0.00

12/31/25

1

1

Industrial

12

Lodging

13

Multifamily

14

Retail

15

Office

16

Retail

17

Lodging

18

Retail

19

Multifamily

20

Retail

21

Mobile 

Home

22

Mobile 

Home

23

Retail

24

Retail

25

Office

26

Lodging

27

Multifamily

28

Multifamily

29

Multifamily

30

Multifamily

P

A

10/06/25

FL

10/06/25

TX

08/06/25

FL

09/06/25

OH

09/06/25

MD

09/06/25

TX

10/06/20

MO

10/06/25

MI

09/06/25

FL

09/06/25

P

A

09/06/25

P

A

09/06/25

OH

12/28/27

MI

09/06/25

OH

09/06/25

GA

09/06/25

FL

10/06/25

AZ

10/06/25

GA

09/06/25

MI

09/06/25

07/03/25

10/06/25

1

1/22/19

08/06/25

04/01/26

06/06/25

10/20/20

07/14/23

07/07/25

06/06/25

07/07/25

07/07/25

09/29/22

09/04/25

08/27/25

06/06/25

10/06/25

07/03/25

06/06/25

06/06/25

31

Office

08/26/25

NY

10/06/25

N

 6,856,220.53

 4.650

 0.00

 0.00

04/06/25

 0.00

5

 0.00

 0.00

-0.84

12/31/25

32

Mobile Home

33

Retail

34

Office

35

Multifamily

36

Multifamily

37

Office

38

Retail

39

Office

40

Retail

41

Multifamily

P

A

09/06/25

NM

09/06/25

CA

09/06/25

TX

09/06/25

OH

09/06/25

AZ

09/06/25

AZ

09/06/25

TX

08/06/25

TX

08/06/25

GA

09/06/25

07/07/25

06/06/25

08/06/25

05/06/25

06/06/25

06/06/25

09/05/25

08/06/25

07/03/25

07/03/25

Page 18 of 26

GS Mortgage Securities 

T

rust 2015-GC34

 Commercial Mortgage Pass-Through Certificates, Series 2015-GC34

May 2026

LOAN LEVEL DE

T

AIL

Property

Transfer

Maturity

Neg

End Schedule 

Note

Sched

Prepay

Prepay

Paid 

Prepay

Loan

Interest

Yield Maint 

PFY

Operating

Loan ID

Type

Date

Stat

Date

Am

Balance

Rate

P&I

Adj

Date

Thru

Premium

Status **

Payment

Charges

DSCR

Stmnt

42

Retail

43

Retail

44

Self Storage

45

Multifamily

46

Retail

47

Retail

48

Office

49

Self 

Storage

50

Self 

Storage

51

Office

52

Retail

53

Retail

54

Self Storage

55

Mixed Use

56

Mobile Home

57

Mobile Home

CA

09/06/25

TX

10/06/25

AZ

10/06/20

MI

09/06/25

MI

09/06/25

GA

09/06/25

CA

09/06/25

P

A

10/06/25

AZ

08/06/25

TX

10/06/25

MO

09/06/25

TX

07/06/25

AZ

09/06/25

IL

10/06/25

IN

09/06/25

IN

09/06/25

05/06/25

04/25/25

06/05/20

09/04/25

09/04/25

03/17/23

05/06/25

07/03/25

07/22/25

03/1

1/26

08/04/25

04/04/25

09/05/25

10/06/25

1

1/05/25

06/06/25

Count:

57

Totals:

 217,270,252.45

 0.00

 0.00

 0.00

 0.00

 0.00

* If State field is blank or ’XX’, loan has properties in multiple states.

** Loan Status:  A = Payment not received but still in grace period; B = Late Payment but less than 30 days delinquent; 0 = Current; 1 = 30-59 Days Delinquent; 2 = 60-89 Days Delinquent;

         3 = 90-120 Days Delinquent;  4 = Performing Matured Balloon;  5 = Non-Performing Matured Balloon; 6 = 121+ Days Delinquent; R = Repurchased.

Page 19 of 26

GS Mortgage Securities 

T

rust 2015-GC34

 Commercial Mortgage Pass-Through Certificates, Series 2015-GC34

May 2026

M

A

TERIAL BREACHES AND DOCUMENT DEFECTS

Ending Principal

Loan ID

Balance

Material Breach Date

Date Received Notice

Description

Count:

Totals:

Page 20 of 26

5M  to  9.9M

15M  to  19.9M

20M  to  24.9M

75M  to  79.9M

4

.

250%

-

90M  to  94.9M

4

.

490%

4

.

500%

-

4

.

740%

4

.

750%

-

4

.

990%

GS Mortgage Securities 

T

rust 2015-GC34

 Commercial Mortgage Pass-Through Certificates, Series 2015-GC34

May 2026

MORTGAGE LOAN CHARACTERISTICS

Remaining Principal Balance

45

40

Count 

Balance ($)

%

5M  to  9.9M

1

15M  to  19.9M

1

20M  to  24.9M

1

75M  to  79.9M

1

90M  to  94.9M

1

Total

5

$6,856,220.53

$17,713,593.77

$20,716,554.66

$79,858,200.63

$92,125,682.86

$217,270,252.45

3.16%

35

8.15%

30

9.53%

36.76%

25

42.40%

20

100.00%

15

10

5

0

Gross Rate

50

4.250% 

-

4.490%

4.500% 

-

4.740%

4.750% - 4.990%

Total

Count

           Balance ($)

1

$92,125,682.86

3

$104,428,014.93

1

$20,716,554.66

5

$217,270,252.45

%

42.40%

48.06%

9.53%

100.00%

40

30

20

Total Weighted Average Rate: 4.56%

10

0

Page 21 of 26

NEW YORK

ILLINOIS

VARIOUS

GS Mortgage Securities 

T

rust 2015-GC34

 Commercial Mortgage Pass-Through Certificates, Series 2015-GC34

May 2026

MORTGAGE LOAN CHARACTERISTICS

Geographic Distribution by State

NEW YORK

ILLINOIS

VARIOUS

Count

Balance ($)

%

3

$107,430,975.82

49.45%

1

$92,125,682.86

42.40%

1

$17,713,593.77

8.15%

Total

5

$217,270,252.45

100.00%

50

40

30

20

10

0

Property 

T

ype

Mixed Use

Office

Retail

Various

  Count

1

2

1

1

Balance ($)

%

$79,858,200.63

36.76%

$98,981,903.39

45.56%

$17,713,593.77

8.15%

$20,716,554.66

9.53%

Various

9.5

Retail

8.2

Mixed Use

36.8

Mixed Use

36.8%

Office

45.6%

Retail

8.2%

Various

9.5%

Total

5

$217,270,252.45

100.00%

Total:

100.0%

Office

45.6

Page 22 of 26

GS Mortgage Securities 

T

rust 2015-GC34

 Commercial Mortgage Pass-Through Certificates, Series 2015-GC34

May 2026

MORTGAGE LOAN CHARACTERISTICS

Seasoning

60

Months

 126 -  128

 129 -  131

   Count

3

2

Balance ($)

%

50

$107,430,975.82

49.45%

40

$109,839,276.63

50.55%

Total

5

$217,270,252.45

100.00%

30

Total Weighted Average Seasoning:  128

20

10

0

 126 -  128

 129 -  131

Remaining 

T

erm to Maturity

100

Months

Count

Balance ($)

%

80

  0 -   2

Total

5

$217,270,252.45

100.00%

5

$217,270,252.45

100.00%

60

Total Weighted Average Remaining Months:  1

40

20

0

  0 -   2

Page 23 of 26

 0.000 - 0.490

 -1.00 - -0.51

 1.000 - 1.490

Not Avail.

GS Mortgage Securities 

T

rust 2015-GC34

 Commercial Mortgage Pass-Through Certificates, Series 2015-GC34

May 2026

MORTGAGE LOAN CHARACTERISTICS

DSCR

80

70

Count

Balance ($)

%

60

 -1.00 - -0.51

 0.000 - 0.490

 1.000 - 1.490

Not Avail.

1

$6,856,220.53

3.16%

50

2

$171,983,883.49

79.16%

1

$17,713,593.77

8.15%

40

1

$20,716,554.66

9.53%

30

Total

5

$217,270,252.45

100.00%

20

Total Weighted Average DSCR:  0.21

10

0

Amortization 

T

ype

Count

Balance ($)

%

IO/Amortizing/Balloon

Total

5

$217,270,252.45

100.00%

5

$217,270,252.45

100.00%

IO/Amortizing/Balloon

100.00%

Total:

100.00%

IO/Amortizing/Balloon

100.00%

Page 24 of 26

GS Mortgage Securities 

T

rust 2015-GC34

 Commercial Mortgage Pass-Through Certificates, Series 2015-GC34

May 2026

DELINQUENT LOAN DE

T

AIL

Loan ID

1

2

7

10

31

Paid Thru

Date

05/06/2024

07/06/2023

02/06/2026

09/06/2022

04/06/2025

Current

P&I

Advances**

 0.00

 0.00

 0.00

 0.00

 0.00

Outstanding

P&I

Advances***

 0.00

 0.00

 0.00

 0.00

 0.00

Outstanding

Loan

Servicing

Status

Advances

Code*

 0.00

5

 36,983.13

5

 12,187.40

5

 208.00

5

 5,571.50

5

Special

Servicer

Transfer Date

04/25/2024

10/17/2023

08/20/2025

12/23/2019

08/26/2025

Foreclosure

Date

Bankruptcy

Date

Reo

Date

03/10/2026

09/29/2022

Count:

5

T

otals:

 0.00

 0.00

 54,950.03

*   Loan Status:  A = Payment not received but still in grace period; B = Late Payment but less than 30 days delinquent; 0 = Current; 1 = 30-59 Days Delinquent; 2 = 60-89 Days Delinquent;

         3 = 90-120 Days Delinquent;  4 = Performing Matured Balloon;  5 = Non-Performing Matured Balloon; 6 = 121+ Days Delinquent.

** Current advances are not provided but are derived from information received from the Servicer

***Outstanding P&I Advances include the current period 

P

&I Advances and may include Servicer Advance

s

.

Page 25 of 26

GS Mortgage Securities 

T

rust 2015-GC34

 Commercial Mortgage Pass-Through Certificates, Series 2015-GC34

May 2026

SUPPLEMEN

T

AL INFORM

A

TION

Notice Date

May 01, 2018

Notes

Each Certificateholder and Beneficial Owner may access notices on the Certificate Administrator’s Website and each Certificateholder and

Beneficial Owner may register to receive email notifications when such notices are posted on the Certificate Administrator’s Website

;

provided that the Certificate Administrator shall be entitled to reimbursement from the requesting Certificateholders for the reasonable

expenses of posting such notices.

Page 26 of 26

GS Mortgage Securities Trust 2015-GC34 10-D