I would appreciate you guys, if you trying to give me an unreal gold key, I know it's hard to find one these days.

Thank you

Good luck with that.

You could just download it from https://oldunreal.com/downloads/unreal/ as Epic says on their website.

Is those copies of unreal and Unreal 2 and tournament are original, I mean dose unreal come with its expansion? And do the 3 games are the full version? And is the multi-player works on those games?

Yes, Unreal Gold comes with the Unreal: Return to Na Pali expansion. That expansion addition is what makes the Unreal Gold "Gold".

Mutiplayer will not work out-of-the-box. You will need to install the Unreal 227 community patch over it which you can find at OldUnreal.com or their github. https://github.com/OldUnreal/Unreal-testing/releases

This will allow you to get Unreal fully legally. But it's not at the Gog platform. If you really need it at the Gog platform you will need to find an old GOG Unreal key. Which are very overpriced now at around 60 to 70 euro's,