Gymns became the final team to qualify for the Warehouse Fitness Floodlit Cup semi-finals on Sunday.
A goal in each half from Kayleigh Whitehead booked their place at the expense of Colby in a 2-1 win.
The southerners, who only needed a draw to qualify, replied through debutant Sarah Wignall.
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Ravens heading to Padiham for what could be finale to 25/26 campaign
Rugby: Douglas head to Vale of Lune for play-off challenge
Vagabonds Ladies and Ramsey face final home games of season
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They could become second Island side to reach an EH final this season
Football: 2026 Hospital Cup & Junior Cup competitions to get underway
Preliminary rounds of both tournaments dominate weekend football schedule
'It's a great opportunity' Island cricketers speak on chance to represent European sides
Lucy Barnett and Carl Hartmann will play for ICC teams