Huh? Are you saying that gifts require an FFL transfer now, or do you speak hypothetically?
Across state lines. That's the missing caveat in what he said. You can inherit/bequest across state lines without an FFL, assuming the items are legal in the receiver's state. Although that has nothing to do with the FFL status. If you try to FFL an item that's illegal in your state, you still obviously can't have it by state law anyway.
This is because bequests/inheritance are not "commerce" and as such does not come under the GCA 68's authority from the Interstate Commerce Clause of the Constitution.
You cannot gift a firearm across state lines without an FFL. Gifts are "commerce" I guess.
In-state is up to your local state regulations, which vary, but the ATF fed.gov has no say in it because it does not have ICC authority either.