TheEvilAlex: I just received this message in the email that GOG sent me.

"Hello,

I apologize for not being able to respond sooner. Registration for The
Witcher is currently down and there is no info from game's publisher
when it will be back up again. We will start sending out keys as soon as
registration works."

Just to let you guys know.

LeonardoCornejo: So we are screwed on that one for now? well, I can not complain, GOG is still better than the alternative.

Gydion: What? Three years later? No, you are not.

Gydion: Wait, I might be confused. What's a registration key and why do you need it?

LeonardoCornejo: A key to register the game online which is located in the inner part of the instruction booklet cover, but the GOG version does not have it.

olnorton: CDPROJEKT stopped using the online registration years ago
You don't get a key now because you don't need one.