It's gone.
Deal with it.
That's what you get when you buy from illegitimate and shady sources.
Next time always buy a GOG game from GOG ONLY.
However, The Witcher 3 GOG copy is sold on Humble Bundle too.

Few weeks back I had a very serious discussion about G2A and other shady reseller that they are NOT legit source to get game.
Even after my explanation the other guy was not buying the fact that G2A is a grey market for games.
The discussion turned sour and I left it.
You can't deal with idiots who think G2A is better than HumbleBundle/Steam/GOG.

I do wish GOG would send a notice when removing revoked games from giftees' libraries, rather than simply have them disappear (as I assume is what happens) - that would help to avoid confusion and shift the blame where it actually belongs. I'm sorry this happened to you. Unfortunately, it's quite a common occurrence here to see threads about games being bought from G2A and then disappearing. It's not that GOG is punishing you from buying from G2A or anything like that - they have no way of knowing where you got the game from - but most likely that they receive a chargeback on the original payment for the game, and then revoked the purchase of the gift code, causing he game to vanish.

In a nutshell, G2A has legitimate sellers but also happens to be a haven for credit card thieves wishing to launder money. They use stolen credit card details to buy gift codes, and sell them on G2A for prices lower then the cheapest they've ever been on sale so that they get bought before the credit card owner has a chance to can cancel the transaction. Only a fraction of the defrauded card owners get the charges reversed, and of those that do only a fraction of defrauded G2A buyers who lose the now-revoked games get their money back from G2A. All the rest goes into the thieves' pockets.

I recommend that you seek a refund from G2A, and get a chargeback ASAP if they refuse or drag their heels.

those type of people wil only learn by one way
and that is if the purchase comes back to haunt them bites em on the ass and the game is revoked

and even then they wil just bitch whine and complain instead of realizing they got two timed by a shady reseller

Yeah, they should send something like <see attached image>
Funny thing is they blame GOG for that.

Seems like these things happen pretty fast, there must be some kind of time limit involved in credit card purchase.
But GOG definitely should inform the user what they've done and why.
That way they can at least immediately start harassing the shady seller.

There are two kinds of people: me, and all the others.

deleted

"I like how the game looks, but I'd rather pirate, steal bandwidth *and* donate money to thieves so long as the devs don't see a cent." Serves you right. I hope you get refunded tho, because card thieves are still worse. (But not by much.)