What gear to get for WvW pvp?
There is a pvp point system to buy pvp gear, as well as a WvW point system to buy WvW gear.
If you really want to grind, and I mean GRIND for the WvW gear, collect “Badges of Honor” from loot bags dropped from Invaders/Defenders and use them at the WvW merchant.
The weapon/armor merchant for WvW is located in the Eternal Battlegrounds near the Asura Portals, right when you enter they should be a bit further forward and on your left.