As stated if you already own it(me have it steam) contact support to get a license key to give away. But cant find an email to the support and to use the online support thingy where I be asked 1000 irrelevant questions thats needed to answered and to the fill it up by present my system report just to ask for a promised key.
pls help

If you're logged in at gog, scroll down and choose contact us from the left side.
Choose any of the BIG topics, then don't click any of the Problems or FAQ-Solution, scroll down again and choose "No anwser found, contact gog".
No you should have a Supportmail, yes you need to give them a description of the Problem, your Email and Topic for the Problem...but how are they supposed to help you without that infos :)

yeah I finnaly got thrue to support but as I didnt got the free games in my gog library they just inserted them and now they are mine. So now I got them in both gog and steam and no possibillity to give them away.