Gustav Czopp (who went by the name of Gustaaf Czopp) joined the AVRO broadcasting network in the 1930s. He worked on radio plays and as a quizmaster. From 1934 he was a reporter for AVRO's Radio Journaal news. He acted with the N.V. Theater, the Vereenigde Schouwspeler and the Kunstcabaret De Toovenaar.
P.H. Honig (ed.), Acteurs- en Kleinkunstenaarslexicon. 3200 namen uit 100 jaar Nederlands toneel (Heino/Diepenveen 1984) 188-189
Gustav Czopp was a member of artistclub De Kring.
A. Hendriks, In intieme kring. De 85 roemruchte jaren van kunstenaarssocieteit De Kring onthuld (Amsterdam 2007)
Gustav Czopp got divorced in Juni 1941. His wife and his only child survived the war.
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Gustav Czopp wrote several books and articles:
De wereld kreeg Radio (Querido 1939);
'Over het wezen van de humor', in: De Prins (reprinted in Blotto 15, winter 1990/'91);
A variété adaptation of Het spel van Tom Poes (1942). Marten Toonder writes about this publication in his autobiography Het geluid van bloemen, part II, 1939-1945 (Amsterdam 1993) 117