I don't see why not. If I can send a friend request to someone who isn't online, and they get it when they log in, the same should apply to guild invites.
Cruis
12-17-2012, 09:48 PM
I know, right? That's agrivating. My friend rarely gets on, but when he does I'm not on - and he wants to join my guild. So I can never end up inviting him.