How to find the correct game when creating a giveaway?

there is an unofficial list on the forum (can't remember where)

I understand your suggestion and it would be new user friendly as you said. I don't know it will be added or not but if you want a list for now here you look at this, https://www.steamgifts.com/discussion/pJRbR/can-we-have-a-list-of-games-that-cannot-be-created-as-giveaway-unofficial-list-inside

Edit: 30 sec late :(

It not being on top is sg's way of telling you it was given away.

A list is nice - but actually, something saying that you can't give away game XY would be much more comfortable. And it might even prevent people from choosing a similar title if they don't find the game they are trying to give away.
It would also be a nice addition, if on creating a giveaway the tool would tell you if a game is on the bundle list or not. There's also a list for that, even an official one, but it would be nice to know on creating without having to check before.

If you type the full name of the game and it doesn't come on top of the list, it's because you can't make a GA for it. Hope it answer your question:)

Yes, thank you all for the answers :). I think it still would be a good idea to implement a message for it. But I will take not finding the game as the hint it was once free.

Its a shame those games cant be given away, there are some on the list I would've liked.