Use Your Gamer Launch Account
Your account from any Gamer Launch site is valid here.
If you already have a Gamer Launch account connect your Facebook account on your user profile first before using Facebook connect to login. Otherwise you may end up with a new account.
Dont fuck around thinking you are safe... 5 people from my old guild on staghelm have lost their accounts because of this shit. So please take the 2-3 minutes it takes to update, and do it.