Can giveaway this?

no

For which game?

http://www.steamgifts.com/support

STEAMgifts i will repeat it again STEAMgifts , still nothing ? STEAM GIFT . STEAM .

just gimme the vegas and you won't need to worry about the rules :))

You can only giveaway steam redeemable games on this website.

You can only giveaway games where it can be activated on steam, be it in gift-able forms or keys(As long as they are not exploited).
If you find this answer useful, could close the thread to prevent more spam and trolls.