Gaunce, a 6-foot-2 forward, was selected by the Vancouver Canucks in the first round (No. 26) of the 2012 NHL Draft after he had 68 points (28 goals, 40 assists) in his second season with Belleville of the Ontario Hockey League. On Aug. 13, 2012, he signed a three-year, entry-level contract with the Canucks.
The Sudbury, Ontario, native was Belleville's captain until he was traded to Erie on Nov. 26, 2013. In 43 games with Erie, he had 46 points (21 goals, 25 assists), finishing the season with 72 points (31 goals, 41 assists) in 65 games between the two teams.