Gallant led the Golden Knights to one of the most successful debut seasons for an expansion team in North American major professional sports history. On January 3, 2018, it was announced that Gallant would coach the Pacific Division All-Stars in the 2018 NHL All-Star Game. On February 1, 2018, the Golden Knights set the NHL record for most wins (34) by an expansion franchise in league history. The mark was set in only 50 games played. They clinched the Pacific Division title on March 31, becoming the first true expansion team in the four major sports to do so (not counting all-expansion divisions). On April 25, 2018, Gallant was nominated for the Jack Adams Award for the second time, which he would be awarded on June 20. Under his watch, the Golden Knights advanced all the way to the Stanley Cup Finals, losing to the Washington Capitals in five games.