Apparently the GW2 servers are currently down for Maintenance, with the following info:
We will be conducting maintenance on the game on Tuesday, August 6th, starting at 12:01 AM PDT (07:01 UTC / 09:01 CEST). This maintenance period will last up to 6 hours.
The following systems will be down and will not be available for the duration of the maintenance:
-Guild Wars 2 : players will be logged out of the game starting at 12:01 AM PDT (07:01 UTC / 09:01 CEST) and during the maintenance, players will not be able to login to play.
-The Gem Store, Currency Exchange, and Trading Post
-The Guild Wars 2 Forums will be closed to logins
We appreciate your patience and understanding and hope that you find something fun to do while we conduct this maintenance. : -)
Most servers should be down for 3 hours although according to GW2Guru Gandara is special and will be down for 6 hours!