UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington D.C. 20549

FORM 8-K

CURRENT REPORT
Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

September 5, 2025
Date of Report (Date of Earliest Event Reported)

Central Index Key Number of the issuing entity: 0001798388
GS Mortgage Securities Trust 2020-GC45
(Exact name of issuing entity)

Central Index Key Number of the registrant: 0001004158
GS Mortgage Securities Corporation II
(Exact name of registrant as specified in its charter)

Central Index Key Number of the sponsor: 0001541502
Goldman Sachs Mortgage Company
(Exact name of sponsor as specified in its charter)

Central Index Key Number of the sponsor: 0001701238
Citi Real Estate Funding Inc.
(Exact name of sponsor as specified in its charter)

Central Index Key Number of the sponsor: 0001541294
German American Capital Corporation
(Exact name of sponsor as specified in its charter)

New York		333-226082-06		38-4129104 38-4129105 38-4129106 38-7235651
(State or other jurisdiction of incorporation of issuing entity)		(Commission File Number of issuing entity)		(I.R.S. Employer Identification Numbers)

c/o Computershare Trust Company, N.A., as agent for
Wells Fargo Bank, National Association
9062 Old Annapolis Road
Columbia, MD 21045
(Address of principal executive offices of the issuing entity) (Zip Code)

(212) 934-2882
Registrant's Telephone number, including area code

Former name or former address, if changed since last report: Not Applicable

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act(17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act(17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading Symbol(s)	Name of each exchange on which registered

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

☐ Emerging growth company

☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised Financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.

Item 8.01 Other Events.

The 650 Madison Avenue Mortgage Loan, which constituted approximately 3.8% of the asset pool of the issuing entity as of its cut-off date, is an asset of the issuing entity and is part of a loan combination that is being serviced and administered under the trust and servicing agreement, dated as of December 8, 2019, relating to the MAD Commercial Mortgage Trust 2019-650M filed as Exhibit 4.4 to the registrant’s Current Report on Form 8-K filed on January 30, 2020 (the “MAD 2019-650M TSA”). Pursuant to Section 7.1(d) of the MAD 2019-650M TSA, 3650 REIT Loan Servicing LLC, a Delaware limited liability company, was removed as special servicer of the 650 Madison Avenue Mortgage Loan and Green Loan Services LLC (“Green Loan”), a Delaware limited liability company, was appointed as the successor special servicer of the 650 Madison Avenue Mortgage Loan under the MAD 2019-650M TSA.

In the interest of transaction management, this Current Report on Form 8-K is being filed to record that, effective as of September 5, 2025, the 650 Madison Avenue Mortgage Loan will be specially serviced, if necessary, pursuant to the MAD 2019-650M TSA, by Green Loan. Green Loan maintains its principal special servicing office at 1 Vanderbilt Avenue, New York, New York 10017 and its telephone number is (212) 594-2700.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

GS Mortgage Securities Corporation II
(Depositor)

/s/ Scott Epperson
Scott Epperson, Chief Executive Officer

Date: September 5, 2025

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington D.C. 20549

FORM 8-K

CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington D.C. 20549

CURRENT REPORT
Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

GS Mortgage Securities Trust 2020-GC45 8-K