Gymns booked their place in the MBL Floodlit Cup but only after being given a scare by Peel on Sunday.
Goals from Mia Brigantova, Alannah Hall and Eleanor Gawne saw them through after the westerners had led 2-1 at the Bowl.
Their markswomen were Katie Meads and Ellan Cleator.
Corinthians, who had already qualified for the last four, finished as group winners with a 4-0 win over a resolute Rushen, courtesy of goals from Charlotte Wynne-Smythe, Sarah O’Reilly, Shannon Groves and Stephanie Hall.
Cycling: Expressions of interest open for 2027 Island Games squad
Riders sought to represent Isle of Man in the Faroe Islands
Isle of Man FA to meet with FC Isle of Man over women's team plans
'The Ravens' announced intent to form new squad earlier this week
Rugby: Manx players selected for Sale Sharks player development system
Initiative aims to identify upcoming talent in the sport
Basketball: Thrilling start to 2026/27 Manx season
Defending champions, Jets taken all the way by Southern Phoenix