EX-31 Rule 13a-14(d)/15d-14(d) Certifications.





I, Scott Epperson, certify that:



1. I have reviewed this report on Form 10-K and all reports on
Form 10-D required to be filed in respect of the period covered by this report
on Form 10-K of the GS Mortgage Securities Trust 2020-GC45 (the "Exchange
Act periodic reports");



2. Based on my knowledge, the Exchange Act periodic reports, taken
as a whole, do not contain any untrue statement of a material fact or omit to
state a material fact necessary to make the statements made, in light of the
circumstances under which such statements were made, not misleading with
respect to the period covered by this report;



3. Based on my knowledge, all of the distribution, servicing and
other information required to be provided under Form 10-D for the period
covered by this report is included in the Exchange Act periodic reports;



4. Based on my knowledge and the servicer compliance statements
required in this report under Item 1123 of Regulation AB, and except as
disclosed in the Exchange Act periodic reports, the servicers have fulfilled
their obligations under the servicing agreements in all material respects; and



5. All of the reports on assessment of compliance with servicing
criteria for asset-backed securities and their related attestation reports on
assessment of compliance with servicing criteria for asset-backed securities
required to be included in this report in accordance with Item 1122 of
Regulation AB and Exchange Act Rules 13a-18 and 15d-18 have been included as an
exhibit to this report, except as otherwise disclosed in this report. Any
material instances of noncompliance described in such reports have been
disclosed in this report on Form 10-K.



In giving the certifications above, I have reasonably relied on
information provided to me by the following unaffiliated parties:



Midland Loan Services, a Division of PNC Bank, National
Association, as Master Servicer, Midland Loan Services, a Division of PNC Bank,
National Association, as General Special Servicer, CWCapital Asset Management
LLC, as Starwood Special Servicer, Wells Fargo Bank, National Association, as
Trustee and Certificate Administrator, Wells Fargo Bank, National Association,
as Custodian, Pentalpha Surveillance LLC, as Operating Advisor, Computershare
Trust Company, National Association, as Servicing Function Participant for the
Certificate Administrator, Computershare Trust Company, National Association,
as Servicing Function Participant for the Custodian1, Midland Loan Services, a
Division of PNC Bank, National Association, as Primary Servicer for the 19100
Ridgewood Mortgage Loan, Midland Loan Services, a Division of PNC Bank,
National Association, as Special Servicer for the 19100 Ridgewood Mortgage
Loan, Wells Fargo Bank, National Association, as Trustee for the 19100
Ridgewood Mortgage Loan, Wells Fargo Bank, National Association, as Custodian
for the 19100 Ridgewood Mortgage Loan, Park Bridge Lender Services LLC, as
Operating Advisor for the 19100 Ridgewood Mortgage Loan, Computershare Trust
Company, National Association, as Servicing Function Participant for the
Custodian for the 19100 Ridgewood Mortgage Loan, Midland Loan Services, a
Division of PNC Bank, National Association, as Primary Servicer for the Harvey
Building Products Mortgage Loan, Midland Loan Services, a Division of PNC Bank,
National Association, as Special Servicer for the Harvey Building Products
Mortgage Loan, Wells Fargo Bank, National Association, as Trustee for the
Harvey Building Products Mortgage Loan, Wells Fargo Bank, National Association,
as Custodian for the Harvey Building Products Mortgage Loan, Pentalpha
Surveillance LLC, as Operating Advisor for the Harvey Building Products
Mortgage Loan, Computershare Trust Company, National Association, as Servicing
Function Participant for the Custodian for the Harvey Building Products
Mortgage Loan, KeyBank National Association, as Primary Servicer for the
Bellagio Hotel and Casino Mortgage Loan, Situs Holdings, LLC, as Special
Servicer for the Bellagio Hotel and Casino Mortgage Loan, Wells Fargo Bank,
National Association, as Trustee for the Bellagio Hotel and Casino Mortgage
Loan, Wells Fargo Bank, National Association, as Custodian for the Bellagio
Hotel and Casino Mortgage Loan, Park Bridge Lender Services LLC, as Operating
Advisor for the Bellagio Hotel and Casino Mortgage Loan, Computershare Trust
Company, National Association, as Servicing Function Participant for the
Custodian for the Bellagio Hotel and Casino Mortgage Loan, Midland Loan Services,
a Division of PNC Bank, National Association, as Primary Servicer for the
Broadcasting Square Mortgage Loan, Rialto Capital Advisors, LLC, as Special
Servicer for the Broadcasting Square Mortgage Loan, Wells Fargo Bank, National
Association, as Trustee for the Broadcasting Square Mortgage Loan, Wells Fargo
Bank, National Association, as Custodian for the Broadcasting Square Mortgage
Loan, Park Bridge Lender Services LLC, as Operating Advisor for the
Broadcasting Square Mortgage Loan, Computershare Trust Company, National
Association, as Servicing Function Participant for the Custodian for the
Broadcasting Square Mortgage Loan, Midland Loan Services, a Division of PNC
Bank, National Association, as Primary Servicer for The Shoppes at Blackstone
Mortgage Loan, Rialto Capital Advisors, LLC, as Special Servicer for The
Shoppes at Blackstone Mortgage Loan, Wells Fargo Bank, National Association, as
Trustee for The Shoppes at Blackstone Mortgage Loan, Wells Fargo Bank, National
Association, as Custodian for The Shoppes at Blackstone Mortgage Loan, Park
Bridge Lender Services LLC, as Operating Advisor for The Shoppes at Blackstone
Mortgage Loan, Computershare Trust Company, National Association, as Servicing
Function Participant for the Custodian for The Shoppes at Blackstone Mortgage
Loan, Midland Loan Services, a Division of PNC Bank, National Association, as
Primary Servicer for the PCI Pharma Portfolio Mortgage Loan, Rialto Capital
Advisors, LLC, as Special Servicer for the PCI Pharma Portfolio Mortgage Loan,
Wells Fargo Bank, National Association, as Trustee for the PCI Pharma Portfolio
Mortgage Loan, Wells Fargo Bank, National Association, as Custodian for the PCI
Pharma Portfolio Mortgage Loan, Park Bridge Lender Services LLC, as Operating
Advisor for the PCI Pharma Portfolio Mortgage Loan, Computershare Trust
Company, National Association, as Servicing Function Participant for the
Custodian for the PCI Pharma Portfolio Mortgage Loan, Midland Loan Services, a
Division of PNC Bank, National Association, as Primary Servicer for the Cobb
Place Mortgage Loan, Rialto Capital Advisors, LLC, as Special Servicer for the
Cobb Place Mortgage Loan, Wells Fargo Bank, National Association, as Trustee
for the Cobb Place Mortgage Loan, Wells Fargo Bank, National Association, as
Custodian for the Cobb Place Mortgage Loan, Park Bridge Lender Services LLC, as
Operating Advisor for the Cobb Place Mortgage Loan, Computershare Trust
Company, National Association, as Servicing Function Participant for the
Custodian for the Cobb Place Mortgage Loan, KeyBank National Association, as
Primary Servicer for the 650 Madison Avenue Mortgage Loan, LNR Partners, LLC,
as Special Servicer for the 650 Madison Avenue Mortgage Loan, Wilmington Trust,
National Association, as Trustee for the 650 Madison Avenue Mortgage Loan,
Citibank, N.A., as Custodian for the 650 Madison Avenue Mortgage Loan, U.S.
Bank National Association, as Servicing Function Participant for the 650
Madison Avenue Mortgage Loan, KeyBank National Association, as Primary Servicer
for the Parkmerced Mortgage Loan, KeyBank National Association, as Special
Servicer for the Parkmerced Mortgage Loan, Wells Fargo Bank, National
Association, as Trustee for the Parkmerced Mortgage Loan, Wells Fargo Bank,
National Association, as Custodian for the Parkmerced Mortgage Loan, Park
Bridge Lender Services LLC, as Operating Advisor for the Parkmerced Mortgage
Loan, Computershare Trust Company, National Association, as Servicing Function
Participant for the Custodian for the Parkmerced Mortgage Loan, KeyBank
National Association, as Primary Servicer for the 1633 Broadway Mortgage Loan,
Situs Holdings, LLC, as Special Servicer for the 1633 Broadway Mortgage Loan,
Wells Fargo Bank, National Association, as Trustee for the 1633 Broadway
Mortgage Loan, Wells Fargo Bank, National Association, as Custodian for the
1633 Broadway Mortgage Loan, Pentalpha Surveillance LLC, as Operating Advisor
for the 1633 Broadway Mortgage Loan, Computershare Trust Company, National
Association, as Servicing Function Participant for the Custodian for the 1633
Broadway Mortgage Loan, Midland Loan Services, a Division of PNC Bank, National
Association, as Primary Servicer for the 560 Mission Street Mortgage Loan,
KeyBank National Association, as Special Servicer for the 560 Mission Street
Mortgage Loan, Wells Fargo Bank, National Association, as Trustee for the 560
Mission Street Mortgage Loan, Wells Fargo Bank, National Association, as
Custodian for the 560 Mission Street Mortgage Loan, Park Bridge Lender Services
LLC, as Operating Advisor for the 560 Mission Street Mortgage Loan, and
Computershare Trust Company, National Association, as Servicing Function
Participant for the Custodian for the 560 Mission Street Mortgage Loan.







Dated:
March 17, 2023





/s/ Scott Epperson

Scott Epperson

Chief Executive Officer

(senior
officer in charge of securitization of the depositor)