Canada here, and I don't think I've ever seen a Gamestop selling magazines. It's always just been a store that only sells games and game accessories, nothing else.
Any other Canadians want to fill in on this?
I've never seen an EBgames that doesn't sell magazines.
I've also never seen an actual Gamestop store in Canada.
Edit* They might just have the magazines in a back room or behind the counter. If you ask for it, they'll probably be able to get it for you.