In the 1963 Minto Cup, the Gaels won the National title by defeating the Victoria Shamrocks 4 games to 2.
In 1969, the Gaels finally got to beat someone else for the Minto Cup again, facing the South Vancouver Legion and sweeping them 4 games to none.
The Green Gaels played OLA Junior A Lacrosse until 1983 when they folded operations after 21 years in the league.
Remarkably though, between 1998 and 2004 the Gaels won 2 Provincial titles (2000, 2004) and 4 Founders Cups (1998, 2000, 2002, 2004) as National Champions.
The 1998 Founders Cup championship team was inducted into the Clarington sports hall of fame on October 20, 2012.
After falling short in the Founders cup tournament the year before (winning bronze over Elora) and having 2 of the top 3 point getters leaving due to being overage, many had the Gaels finishing in the bottom half of the Eastern conference.
1st round vs Scarborough The Gaels won 3 straight games by scores of 9-5, 13-4 and an unbelievable 12-0 leading them to play the only team to hand them a loss in the regular season the Nepean Knights.
Elora vs the Green Gaels in a matchup of 2 powerhouse teams that dominated the Jr. B loop for the past 2 seasons.
The gaels were leading at that point but Elora dug deep and pulled out the 7-6 win evening up the series @ 2-2.
Game 6 was a chance for Gaels to close out the series in Elora and that is exactly what they did winning 11-10 in overtime on Josh Colley's goal with limited time remaining, giving the Green Gaels the Ontario Cup (their first Ontario cup since reforming in 1995).
The fans in the building in Clarington were silent and things looked bleak, but the Gaels scored 5 goals in the second narrowing the gap to 6-5.
In the first game, the Gaels offense completely disappeared while the Barrie defence was strong in a 4-2 Tornado victory.
That meant, even though the Gaels had finished second in the conference, that they would retain home floor advantage if the series went five games.
With five days off between games, the Gaels practiced hard, knowing full well, one win might get them back into the series.
Game 3 went to the Gaels in a defensive battle holding high scorers Pete Benedict, AJ, Brett, and Drew Bucktooth to only three goals, defeating the Redhawks 11-7.
Was it mentioned that the Redhawks neglected to book lodging anywhere and had to travel to Mississauga Friday evening, and to the Dynasty Inn, in Oshawa the second night?
With 18 seconds left, veteran Green Gael James Hinkson took a pass in front of the redhawks tender and found twine to go up 7-6.
A battle for the face-off ensued with the Redhawks finally gaining possession with two seconds left.
Game over, Gaels win and move onto the Ontario Finals, and more importantly, the Founders Cup.
In the end of a tightly fought game, Doug Trudeau came through for the green, scoring the winner with 50 seconds remaining in the third period.
In the next three games, the Gaels beat the Lightning 10-7, 7-6, and 13-9 to sweep them and earn a berth into the League Final to face the Elora Mohawks.
The Founders Cup tournament started on August 21, 2004, and the first game for the Gaels put them up against the Moose Jaw Mustangs.
The next night, to close out the round robin, the Gaels beat the all-stars from the Iroquois Lacrosse Association 11-7 to finish in first place in their pool.