How can use?
How to redeem Guild Wars card:\n1- Enter the link: http://support.guildwars2.com/gemcards\n2- Log in to Guild Wars 2 with the account where you want to unlock gems.\n3- Open the Black Lion Trading Company panel. The default hotkey is [O]. You can also click the lion icon ( ) in the upper left corner of the game screen.\n4- Click the "Redeem Code" link in the upper left corner of the Store homepage.\n5- Enter or copy and paste your gem code into the field that reads: "Please enter your Gem code"\n6- Click Redeem. Gems are delivered automatically once the code is successfully redeemed.\n