Passet was born in 1936 in Villeneuve-le-Roi. He was the pupil of Marcel Roch and Goerg and was also the chief of Yves Brayer's studio at the Grande Chaumiere Academy.
He has exhibited in numerous one-man and group shows throughout France and the world. Passet has achieved international recognition through the many prizes, scholarships, and awards he has received during his art career.
He is represented in various museums including: The Modern Art Museum of Paris, The Museum Cantini (Marseilles), and The Museum of I'lle de France (Sceaux).
The French Government and the City of Paris have also purchased many paintings by Gerard Passet.