Ambroid is (was?) basically nitro-cellulose material dissolved in acetone and/or other solvents. Duco cement (aka model airplane glue), made by Devcon, is a very similar product, and should perform similarly. It has the advantages of being one part, relatively quick to dry, easily undone (acetone will dissolve it), and water resistant -- waterproof for all practical purposes. Epoxy would certainly be stronger, but would not be as convenient for a field repair. I've not used white Gorilla glue, but if it is anything like ordinary (brown) Gorilla glue, I would pass on it and use either Duco, Epoxy, or maybe Titebond 2 or 3.