I just bought the goty edition for gog, but I noticed all the free dlc on steam, like the quests and alternate looks. How do I get these dlcs on gog? really hope I didn't just waste my money and not even be able to play the whole game...

You can delete this question I have solved it myself, sorry...

i have the same problem.
how did you solve it?

You have to 'purchase' the free DLCs to register them as being in your account. Naturally, you don't actually pay for them, since they're free.

Edit: Oh, wait... you're talking about GOTY? Hmm, they are already bundled, so it must be a Galaxy setting.

Looking at my GOTY copy, you don't have to "enable" it really - you already have it in game. To activate optional extras (like the alternative appearances) just look in the gameplay settings under options in the MAIN menu (not the smaller in-game options menu). I'm pretty sure all the other extras, like armor and contracts don't need to be toggled and are just added by default.