Hi Alex, thanks a lot for trying it and letting me know. You're right about ARM. However it looks like Game Maker Studio can only make Raspberry Pi ARM builds if I physically have a RPi, and it seems I may need to purchase each RPi version I want to support. I won't be able to do it anytime soon, but it would be cool for sure. I can send you an email when I do.
Edit: I misread a thread and thought I had to buy each RPi version I want to support.