I'd never say it that way, and can't remember anyone talking like that, but I know sometimes the "the" can be shortened to a "t" when spoken.
So it might have been "Me friend broke his arm at (t') Gym and I took him to (t') hospital"
Maybe that's what you've (mis)heard (due to difficulties with understanding accents)?
This is also why you might come across term "t'internet".