How to gift ETS 2?

Suppose you can request guys to express interest here, invite them as friends on Steam, and send keys.
Or drop keys here and wait for the ninjas. :)

You can use this thread, where I and others already gave keys for this game to people who had it wishlisted (among many other ungiftable games).

another way is to check trade sections for people that want something, pick someone random, make sure they don't have it in their library and that they are an actual gamer and friend them long enough to gift them or dump a key on them. (instead of trying to trade with them)

You could always check on your friends list to see if anyone has it wishlisted :)

you can buy a dlc bundle and upgrade it to some other ETS2 version that is available on SteamGifts... or trade for something you might want to gift or redeem.

could check reddit, Pif (play it forward) or something similar