I've bought three from the USA, all very expensive, all properly packed - no problems.
Gibsons used to be notorious for being weak in the headstock-joint area. I had an ES335 many years ago that a pissed-up bingo-caller knocked off its stand at a club in Grimsby - headstock broke clean off. Had it re-necked at John Birch's workshop in Rubery.

Sounds as though all will be OK for you - glad to hear that.