GvG???

ok this may be a stupid question... but how do you do GvG (find the place to enter GvG events).. im in a guild and everyone says go to your guild hall but we do not have a guild hall... just so you know we looked everywhere someone said it was on any island and i found islands on the map but no guild hall... does our guild have to earn it or what... could this be a bug?... no one else in the guild can see it either... any info would be great thanks alot

Your guild will need to buy a guild hall. You can buy your hall from the Canthan Ferry Captain at the docks in Lions Arch. He'll sell you a guild hall(though you might need a celestial sigil for it), and once you've bought your guild hall, you can set up GvG matches from there.