Google "G&L truss rod problem" when you're searching for solutions.
Considering the size of their market penetration, there are a lot of reports of re-necking, trouble finding parts, trouble getting through to G&L support, etc.
I consider G&L to be the best of the Fender spin-offs. The US models absolutely ooze quality IMO, but this gives me pause.
I've never had a truss rod issue with any of the G&L's I've owned, which is quite a few.
But just for kicks I googled "G&L truss rod problem", and also googled the same for Fender, Lakland, Carvin, and EBMM. Found complaints about all except EBMM, with the most complaints being about Fender instruments, naturally.
I don't see where G&L is a big standout in this regard, and I suspect much of these complaints stem from either user error, or people repeating things they've read on various web forums.
CS is another story, and getting through to G&L can be difficult, especially near NAMM. OTOH, Fender doesn't exactly jump through hoops for every complaining customer either.
Aside; If you do have a truss rod issue with a G&L bi-cut neck you're pretty much screwed. A repair is possible, but will likely be beyond the capabilities of your average "tech".
Something like this approach might be do-able, depending. Fretboard lifted about 12 inches from the butt end, wood routed away for access to the rod end, which in this case was probably spinning around in the wood. Not pretty but it apparently worked.