I've flown to asia and europe with regular abs cases and bags like the GoPro, and I've always been able to gate check them. Never had a problem, lucky I guess. Now I don't fly with a git, I just make sure there's one where I land, or go without. Too much anxiety that I would put up with 25 years ago. If no guitar, I read a book. I gotta look into that Katana:Go
Now adays I don't like carrying a ton of weight. Got the guitar in a gigbag and it's strapped to my back, the amp weighs less than 25 lbs, that's in one hand, and in my shoulder bag is the rest of the wires, extra strings, nail file, emergency mic ... no pedals. So I can walk and carry everything in one go. Though now adays I use the wireless thingies the Aaron suggested. that's the basics.