Unless things have changes in the intervening years, I would not be worried about the "gift" issue. From age 6 on up I have been shooting and from 10 on up competitively. Many of the trap/skeet competitions awarded a firearm as overall first prize (usually a Remington 870 or 1100). have been gifted more of those firearms than I remember from relatives that had to sign for them because I was under age. I have since sold them to others AFTER asking an ATF fellow the regulations on said sales (hope he was right).

Also, no child in the US would start hunting if not for the gift of a firearm. Just keep track of where you got them and you should be good to go.

Disclaimer: I am not an attorney. In fact, I bailed on law school. I didn't even sleep at a Holiday Inn Express last night.