Won a region locked steam gift

Try to contact the GA creator and ask him for/insist on a copy you can redeem or - if you don't wanna act like a total cuck ;) - just mark it as 'not received' if you're unable to come to terms with him or - IMO the best solution - agree with him on rerolling the GA, usually done by you writing your approval on the GA itself and him opening up a ticket with support.

Hope you'll get it resolved, good luck :).

Let me explain what happened
The new system is not allowing purchasing gifts (well except buying 4-packs...When you unpack it by adding 1 copy in ur library the other 3 will be stored as a gifts in your inventory)
So when he bought you a "gift" and sent it to you It was not a gift but an option to add It or decline It
If you press "Add to library" the game will be added
If you decline it this purchase will be restored and the person who bought it wil have his money back
So this gift is not gone he just got his money back cos u pressed decline
About region lock part
Just contact him again and ask for a row version
If he refuse to do so contact moderator and tell him this story about locked gift and they will solve it

I would assume that, since you couldn't activate the gift, steam returned the copy to the sender.

As to how to solve the GA situation, contact the giveaway creator and tell him of the issue. If he can't give you a copy for your region, you can mark not received after 7 days.

However, you can also agree to reroll the gift or allow the creator to delete the GA... this is what I would do in your situation (it has happened to me before a couple of times and that's how we solved it).

What should I do If I win a game that cannot be activated in my region, or if I receive a gift or key that does not match the game I won?
You should contact the giveaway creator to return the gift, and to inform them of the situation. If the giveaway creator is able to provide you with a replacement gift or key for the same game that can be activated in your region, then you should mark the gift as "Received". In all other cases, the gift should be marked as "Not Received". When marking a gift as "Not Received" it's recommended that you leave an explanation in the giveaway comments as a reference for both the giveaway creator and our support team. If the giveaway creator is not able to provide a replacement gift or key, they may ask your permission to delete the giveaway.

from FAQ

The gifter should not have been able to even gift the game to you in the first place. On the purchase page it details it is region locked if it is for the person receiving the gift.

Find
Those
Locks
¯\_(ツ)_/¯

Yes thats a free copy from a purchase of Into the Breach. I dont know it is regions locked.
The item is not in my item Inventory too.
What should I do lol? Maybe I should contact the Steam support

I can see that in gift history, the item seems already sent to Noctuabundus. I dont know whats going on.

awesome, got that humble key to work. happy day :D