I can confirm the 110 multi-IFR hrs/month rumor as I did it myself. GAM operate under the Fatigue Management System (FMS) which has it's own flight and duty limits (exempt from CAO 48). In terms of flight limits, their pilots are only restricted to a maximum of 1080/year.
If you are lucky enough to get in with GAM, take the Weipa base. Best flying you'll ever do, especially in the wet. I did 430 hrs in 4.5 months which is an average of 95 hrs/month. All multi, all IFR. Beat that.