Starting in February 2012, the top teams of the league played down for the Russell Cup, emblematic of the grand championship of the GMHL.
The league champion was the Sturgeon Falls Lumberjacks as they defeated the Temiscaming Titans 4-games-to-2.
Note: GP = Games played; W = Wins; L = Losses; OTL = Overtime losses; SL = Shootout losses; GF = Goals for; GA = Goals against; PTS = Points; x = clinched playoff berth; y = clinched division title; z = clinched conference title Vaughan is shaded due to their membership being revoked during a league meeting November 28, 2011 for failing to attend mandatory GMHL Showcase Tournament.
The 2011–12 GMHL All-Star Game was hosted by Gravenhurst, Ontario on January 10, 2012.
Result: Note: GP = Games played; G = Goals; A = Assists; Pts = Points; PIM = Penalty minutes Note: GP = Games played; Mins = Minutes played; W = Wins; L = Losses: OTL = Overtime losses; SL = Shootout losses; GA = Goals Allowed; SO = Shutouts; GAA = Goals against average