St. George's are Canada Life Premier League Champions.
They thrashed Castletown 11-0 at The Stadium while rivals Laxey crashed 1-3 at home to Old Boys at Glen Road,
Golden Boot chasing Ciaran McNulty scored six with the other goals coming from Calum Morrissey, captain Sean Quaye, Johnny Myers, Frank Jones and an own goal.
It's the seventh time Geordies have won the title in the last nine years and it's the third of the four parts of the Grand Slam completed.
Next up will be Sunday evening's Hospital Cup quarter-final at home to Rushen.
Steven Priestnal scored seven as St. Mary's overran Gymns 13-1.
In Division Two, Union Mills have the opportunity to clinch the title when they play their final game of the season away to Colby - a win or draw will be good enough.
Last Night Millers won beat Onchan 7-0 while Marown stayed a point clear at the top by winning their last fixture of the campaign 2-1 at home to Pulrose.
Douglas Royal remain in Gold Cup contention thanks to a 3-1 victory away to the Police and Braddan beat Malew 4-0 at Victoria Road.