freezer90: you need to display images in the mail. then there are gfx buttons you can press :)
else you can use the following url (? == your code) :
http://www.gog.com/en/bonus/#???-????
hmmm... I only had the one for the link to pick the "free" game. The rest was blah blah thanks for ordering etc. and here's your activation key...
[EDIT]
just tp be clear since we're also being inundated by non-GOG purchasers, I bought mine from GOG...
[/EDIT]