Exhibit 32.1
CERTIFICATION TO SECTION 906 OF THE SARBANES-OXLEY ACT OF
2002
Pursuant
to 18 U.S.C. § 1350, as created by Section 906 of the
Sarbanes-Oxley Act of 2002, I, Anthony Cataldo, Chief
Executive Officer of GT Biopharma, Inc. (the
“Company”), hereby certify that, to the best of my
knowledge:
(i) the
Annual Report on Form 10-K of the Company for the fiscal year ended
December 31, 2020 (the “Report”) fully complies with
the requirements of Section 13(a) or Section 15(d), as applicable,
of the Securities Exchange Act of 1934, as amended;
and
(ii)
the information contained in the Report fairly presents, in all
material respects, the financial condition and results of operation
of the Company.
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Date: April 16,
2021
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By:
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/s/ Anthony
Cataldo
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Name:
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Anthony
Cataldo
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Title:
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Chief Executive
Officer, Chairman and Director
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