Question about Humble Bundle region lock

If I recall correctly if the game is region-locked you'll get a pop-up informing you about it when you try to convert it to a gift-link.
I generally check thread related to the bundle with game(s) I want to giveaway/trade under Deals section of Discussions just to be sure though.

You only need to click on create gift link. It will prompt you to make sure that you want to create gift link, with region restriction information.