He is a film and television actor, well known for his portrayal as Tommy Williams in The Shawshank Redemption, as Billy Thomas in the television series Ally McBeal and as Matt Callan, a CIA agent in the television series The Agency. He studied at the American Academy of Dramatic Arts in Los Angeles, California to pursue his career in acting. Gil is a member of the Act One Repertory Company of the prestigious Williamstown Theater Festival in Massachusetts.
Accounting his personal life, he is a happily married man. He has been enjoying his marital relation with his wife since 1994. His wife is an actress by profession, with whom Gil has raised a son and a daughter. They started their relationship in 1991 and married in the year 1994. The two seem to have a good chemistry with one another so there is a rare chance of their divorce to happen. They have been dating since 1991.