    <SEC-DOCUMENT>0001493152-23-015669-index.html : 20230505
    <SEC-HEADER>0001493152-23-015669.hdr.sgml : 20230505
    <ACCEPTANCE-DATETIME>20230505172905
    ACCESSION NUMBER:		0001493152-23-015669
    CONFORMED SUBMISSION TYPE:	DEFA14A
    PUBLIC DOCUMENT COUNT:		3
    FILED AS OF DATE:		20230505
    DATE AS OF CHANGE:		20230505

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			GT Biopharma, Inc.
    		CENTRAL INDEX KEY:			0000109657
    		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
    		IRS NUMBER:				941620407
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		DEFA14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-40023
    		FILM NUMBER:		23895138

    	BUSINESS ADDRESS:
    		STREET 1:		8000 MARINA BLVD
    		STREET 2:		SUITE 100
    		CITY:			BRISBANE
    		STATE:			CA
    		ZIP:			94005
    		BUSINESS PHONE:		(800) 304-9888

    	MAIL ADDRESS:
    		STREET 1:		8000 MARINA BLVD
    		STREET 2:		SUITE 100
    		CITY:			BRISBANE
    		STATE:			CA
    		ZIP:			94005

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	OXIS INTERNATIONAL INC
    		DATE OF NAME CHANGE:	19940916

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	DDI PHARMACEUTICALS INC
    		DATE OF NAME CHANGE:	19920703

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	DIAGNOSTIC DATA INC /DE/
    		DATE OF NAME CHANGE:	19850312
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>DEFA14A
    <SEQUENCE>1
    <FILENAME>formdefa14a.htm
    <TEXT>
    Document 1 - file: formdefa14a.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>2
    <FILENAME>formdefa14a_001.jpg
    <TEXT>
    Document 2 - file: formdefa14a_001.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>formdefa14a_002.jpg
    <TEXT>
    Document 3 - file: formdefa14a_002.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>