Gill, 38, attended training camp with the team on a professional tryout. He recorded two assists in three preseason games.
"I'm happy to be part of this team because I think it's a team that has a shot to win and that's what you want," he said following practice Tuesday. "You want a chance to be playing in June and that's what I’m looking forward to.
Gill, who won a Stanley Cup with the Pittsburgh Penguins in 2009, played in 32 games last season with the Nashville Predators. He was an eighth-round pick (No. 207) of the Boston Bruins in the 1993 NHL Draft.
In 1,102 regular-season NHL games with the Bruins, Toronto Maple Leafs, Penguins, Montreal Canadiens and Predators, Gill has 36 goals, 184 points and 960 penalty minutes. He's added six assists in 110 Stanley Cup Playoff games.