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.
Tennis: Billy Harris back in Wimbledon action today
He'll team up with Freya Christie for Mixed Doubles
Golf: 2026 Isle of Man Championships getting underway
Men's and women's knockout phase being held at Rowany Golf Club
Seeded riders confirmed for 2026 Supersport MGP
Farrell to lead the line in this year's class
Enduro: Ramsey prepares to host British championship rounds
Rounds five and six of series taking place on Island this weekend