InkPanther: Just tried to change my password to test this. It turns out you can't without access to email, they send you a password reset link. So unless OP clarifies a couple of things...
ZFR: If someone got his GOG account and email (was he using same password for both?), then what wpegg said could well be true.
I know, but as I've mentioned, until OP actually provides some more information, we're in the dark. And, judging from his participation so far, I kind of doubt OP's gonna do it.
Yes, yes, anticipating "but if he's unable to log in..." I can reply, it's easy to create another account. ;P