GMHL

• 2022-2023: Bradford Rattlers
• 2021-2022: Temiscaming Titans
• 2020-2021: Did not play
• 2019-2020: Did not play
• 2018-2019: Ville-Marie Pirates
• 2017-2018: Almaguin Spartans
• 2016-2017: Parry Sound Islanders
• 2015-2016: Tottenham Steam
• 2014-2015: Temiscaming Titans
• 2013-2014: Bradford Bulls
• 2012-2013: Bradford Rattlers
• 2011-2012: Sturgeon Falls Lumberjacks
• 2010-2011: Elliot Lake Bobcats
• 2009-2010: Deseronto Storm
• 2008-2009: South Muskoka Shield
• 2007-2008: Bradford Rattlers
• 2006-2007: Bradford Rattlers

The league, founded by Bob Russell and Hockeyworks International Ltd., opened its doors in early 2006, with a unique concept and approach to improving the standard of developing young hockey players within a Junior 'A' league format setting.

As of the September 2006, it became clear that the league would operate its first season with seven teams. The original seven were the Bradford Rattlers, Deseronto Thunder, King Wild, Nipissing Alouettes, Richmond Hill Rams, South Muskoka Shield, and Toronto Canada Moose.

The league's first ever game took place on September 8, 2006 between the King Wild and the Richmond Hill Rams at 7:30 PM EST. The final result was a 6-0 victory for the Rams, despite being badly outshot by the Wild. The first goal in the league's history was scored by the Rams' Darren Archibald (future Vancouver Canucks prospect) on the powerplay during the first period. Rams' goaltender Daniel Jones picked up the historical first victory, as well as the league's first shutout in history.

On November 15, 2006, the GMJHL announced its affiliation with the World Hockey Association and creation of the National Junior Hockey Alliance. The affiliation resulted in a national championship between the GMJHL playoff champion and the winner of the WHA Junior West Hockey League after the 2006-07 season.This agreement seems to have only managed to last one season, as the WHAJHL became apparently more erratic.

The first ever regular season of the GMJHL concluded on February 25, 2007 with the Bradford Rattlers leading the way as regular season champs with a record of 37 wins, 1 regulation loss, and 4 overtime losses. In the playoffs, the Rattlers beat the Deseronto Thunder in 6 games, and then the King Wild in 5 games to win the first ever Russell Cup as playoff champions.

In September 2007, the GMJHL started its second season with six new teams, the Douro Dukes, Elliot Lake Bobcats, Espanola Kings, Innisfil Lakers, Tamworth Cyclones, and Temiscaming Royals. The Deseronto Thunder ran into financial trouble after their first season and ownership of the team was transferred to the town. The team is now known as the Deseronto Storm.

On December 11, 2007, the GMJHL announced a seven game challenge series versus a Russian team known as the Moscow Selects. In late December and early January, the top seven teams of the GMJHL will compete against the Moscow Selects-a mixture of top Top Junior talent from the City of Moscow. The Selects played seven games, against Bradford, Innisfil, Temiscaming, Elliot Lake, Richmond Hill, Deseronto, and South Muskoka, winning each game. In March 2008, the King Wild and Richmond Hill Rams played two games each against the Mexico national ice hockey team. The Wild won both their games, while the Rams lost both of theirs.

For the 2008-09 season, the GMJHL will adopt much of the National Collegiate Athletic Association's ice hockey rulebook. The GMJHL added the Minden Riverkings and the Oro-Medonte 77's to the mix, and the Dukes relocated to become the Brock Bucks. At the same time, the Quebec-based Temiscaming Royals walked away from the league to join the Northern Ontario Junior Hockey League, but were replaced within weeks by the Ville-Marie Dragons.

In December 2008 and January 2009, eight teams of the GMHL hosted Kazakhstan's Under-18 Torpedo UST-Kamenogorsk squad. Victorious were the Elliot Lake Bobcats (twice), South Muskoka Shield, King Wild, Bradford Rattlers, Innisfil Lakers, and a Nipissing/Ville-Marie Combine squad. The only loss for a GMHL team happened to the Toronto Canada Moose.

In the Summer of 2010, the GMHL expanded in two fashions internationally. First, the created Canada's only All-Russian team in the Shelburne Red Wings and then late in the summer they expanded to the United States through the expansion of the Jamestown Jets

On September 17, 2010, the GMHL played its first international regulation game, in Jamestown, New York between the Jamestown Jets and Sturgeon Falls Lumberjacks, both expansion teams to the league for the 2010-11 season. Jamestown won the game 4-3. In December 2010, the GMHL named its first full-time commissioner Bob Bernstein.

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