What an awfull experience with this game! After a lot of probles the days post launch today lauching gog in my pc i don't see cyberpunk as an owned game! What can i do? I'm really really frustated this time with cd project.
As showed in the image i played just yesterday

It says you were just playing 2077 37 mins ago you clown.

I've had that problem after I activated it

but found it in owned games, or left side on the installed tab

Where did you obtain the game? Gog Directly or Reseller?

from a reseller but i always buy keys fron them

What shows in your order history under Privacy and Settings?

in this section i can see the game added the 6 december, but still disappeared from my library

if you click the wrong button you can hide games... you'll need to unhide the game or toss a support ticket.. just looking at your account it appears that you own it and are currently playing it at this time sitting in the game menu.

Also GOG is very aware of 3rd party sites and will be removing stolen keys

i'm playng it launching directly the .exe file of the game, i'm my gog library is totally gone

Guess then it's time to ask the reseller if it is possible that your key was revoked. Most likely you are not the first person to ask them if there is a broader problem. If the reseller is honest then they will replace your key.
Or otherwise well time to ask yourself to check if the reseller really is legit (most likely the reseller is not as there are only very few resellers for GOG Keys). Also sometimes resellers get even scammed themselves (like they obtain keys they think to be legit but are not). Gog does not automatically inform somebody if an illegal key gets revoked or not so it is also worth to write a support ticket about it and make sure that it was a "key revokation" and not a bug.
But as game bought by reseller, key first worked and then not my guess is 98% key revoked and 2% there is a bug with your account.

Buy games from gog do resellers on Steam You don't get to own anything on Steam.

Stolen credit card buys keys, sold by reseller, credit card company charge back, key deactivated.....

Sound familiar?

What did you learn?

Everyone's a Liar in Night City

ok thanks, the reseller is kinguin, i will ask if they are aware of the problem to get a new key