Born July 24th 1958, Gaetan began his tenure with the Montreal Canadiens in the fall of 1974 as a part- time assistant to Eddy Palchack and also then therapist Bob Williams. He worked with the Canadiens as a part time trainer while completing his undergraduate at Concordia University. In May of 1981 Lefebvre became the ATC with the Montreal Canadiens Hockey Club. He acted as assistant athletic therapist from 1981 to 1988. He was then promoted to the head therapist position in 1989. He remained in this role until August 2000. Gaetan had the honor of being part of the 1986 and 1993 Stanley Cup Teams. In addition, he was the athletic trainer for the 1981-1984 and 1987 Canada Cup Tournaments.
In 2000 Gaetan then occupied the role of special assistant to the player development sector, overseeing medical documentation of newly drafted players and draft candidates for the Canadiens. He left the Montreal Canadiens in 2003 to successfully pursue his MBA at the John Molson School of Business from 2004 to 2006. In October of 2005 Gaetan Lefebvre co-founded Sutton Medical Systems.
Gates is the proud father of two daughters, Emilie and Florence and he shares his life with Fanny Preault.