most arboreal snakes are best left alone and show only, in fact all snakes would be happy if left alone.. but the handling is for us humans need
that said, GTP s can be handled and most tolerate it well, just need to get them used to it. best is to have cycles where you handle day time only and feed night time only. It should also only be done after they reach 1 year old for their safety.
baby arboreal snakes are delicate, both their tails and necks, they can dislocate their own spine behind the skull by snapping at you and then just die, nothing can be done to save them. They just hang there with their heads down, mouth wide open as if grasping, then later they don't even have the strength to perch and fall to the bottom.. heart breaking to see
so be very slow and careful if you have/need to handle them. once bigger it's safer, but you can still hurt them seriously if they do bite, grab you and you pull back by reflex !!!
I have GTPs ETBs and ATBs almost all can be handled. I just choose not to except for breeding. handling them will stress them a little and can affect my breeding projects.. so I only touch the males..females, even my puppy tame ones, I just leave them be.
hope this helps you a little
Steph
but if all you want is a nice GTP, it sure can be acclimated to be handled and most of them get puppy tame too