Used to have a guild in the first game, and was part of a few other guilds as well. But sh*t dude I would totally join but I have a bit of upgrading
to do on my PC before I can really get into the game. And by a few upgrade I mean I think I may have to pony up the cash for a new PC altogether. So
I may not get into GW2 for a while, if I get into it at all.
But I don't think they have any sort of rule of making teams or guilds in other venues and using this site to get people, at least not that I know
of. Not sure about using the ATS name or logo itself, but really I do not think most people would know or care what it was about in the game world