Gertrude Kuslan was a science fiction fanzine publisher from the U.S.A.
With her brother Louis, Gertrude "Trudy" Kuslan published a number of zines, beginning in the 1930s with The Nucleus. Eleven issues of The Nucleus appeared, the first in July of 1938, and the last issue released in 1944.
At the same time fanzine editor James Taurasi, who was publishing a number of zines, handed over Cosmic Tales to Louis and Gertrude Kuslan, and they released issue 7 in October/November of 1938. The 8th issue was also published by the Kuslans, and was released in December 1938 with a cover by Taurasi. They remain the editors for the next four issues. A special issue, called Cosmic Tales Special appears in 1939; it is the "First World Science Fiction Convention Issue", and the cover announces that it is "Featuring Stories by Nils Helmer Frome, Cyril Kornbloth, and Percival Twinkletose", the last undoubtedly a joke.
The last issue published by Louis and Gertrude Kuslan is Vol.2 No.1 the second anniversary issue of Cosmic Tales, released in Summer 1939.