Otto Gerson was born in Germany and immigrated to the United States, where he met and married Ilse Goehler in 1939. They both became U.S. citizens and together they rose to prominence as art dealers in New York City, circa 1940-1962, bringing works by noted post-war European (and some American) artists to the American market.
The Gersons also owned and operated galleries in New York, including Fine Arts Associates and Gerson Gallery. The Gerson Gallery was located at 41 East 57th Street in New York City and later merged with another gallery to form the Marlborough-Gerson Gallery around 1963, shortly after Otto Gerson's death.