Born in New York City, Gershe made his Broadway debut as a lyricist for the 1950 revue Alive and Kicking. He wrote the book for Harold Rome's musical stage adaptation of Destry Rides Again in 1959, and in 1969 a play, Butterflies Are Free. Later Gershe wrote another play, Snacks, intended for Tony Danza.
1958 Academy Award for Best Writing, Story and Screenplay, Written Directly for the Screen (Funny Face)
1958 Writers Guild of America Award for Best American Musical (Funny Face)
1973 Writers Guild of America Award for Best Comedy Adapted from Another Medium (Butterflies Are Free)
1974 Writers Guild of America Award for Best Comedy Adapted from Another Medium (40 Carats)