Career
Along with John Morris, he is the co-author of the book Fit to Curl. Gemmell began curling in 1978 as a junior in Ontario. Gemmell moved to the United States in 1991, and did not return to curling until he moved to New Jersey in 2006.
He participated in the playdowns to the United States National Championships and the United States Mixed Championship in 2007.
He participated in the 2010 United States Men"s Curling Championship as the lead for Matt Hames, finishing fourth after a loss in the playoffs. He then returned the next year under skip Heath McCormick, who replaced Hames, to the 2011 United States Men"s Curling Championship, where his team again finished fourth.
Gemmell started a curling podcast called in 2005. The podcast releases a few episodes each month and interviews various top curlers and curling builders.