If you've got an active Amazon Prime subscription and are a Dungeons & Dragons fan, you can now claim the GOG version of Neverwinter Nights: Enhanced Edition for free

So, if you're like me you couldn't find this right away. I have the amazon games launcher installed and was looking there. You have to go to gaming.amazon.com and login to find your GOG key. I also had one for Prey that I claimed while I was there.