He retired from competitive ice hockey in 1909, but returned to play two games for Ottawa in the 1915–16 season.

At 15, Gilmour played for the Ottawa Aberdeens in the Canadian Amateur Hockey League intermediate division.

After finishing McGill in 1907, Gilmour played one season with the Montreal Victorias, scoring five goals in ten games.

At the start of the First World War Gilmour enlisted in the Canadian Expeditionary Force and was commissioned as a lieutenant in the 1st Construction Battalion.

[2] Gilmour married Merle Woods of Montreal and moved to Paris, France before returning to Canada in 1942 to reside in Mount Royal, Quebec, where he lived for the rest of his life.