Originally bent on a career in medicine, Gascon abandoned it for the stage after considerable work with amateur groups in Montreal.

During this time, he also started a long association with the newly established Stratford Festival in 1956, playing the Constable of France in Henry V and directing three farces by Moliere.

In 1963 he returned to Stratford to direct The Comedy of Errors, and then Le Bourgeois gentilhomme and The Marriage of Figaro the following season.

[1] Gascon's career in the Canadian theatre as a bilingual actor and director achieved an impressive reputation.

Gascon died of a heart attack in 1988 in Stratford, Ontario[1] and was entombed at the Notre Dame des Neiges Cemetery in Montreal.