[Spoilers]
So i've just cleared pretty much all the island in Act1 from potential enemies and threats and post poned Gawin's quest (he is the teleporting gloves guy) to clear the path for him since i was actually curious if it was possible to let him live despite his betrayal:
Without clearing the path, he'll get killed by the magisters at the Docks or by the Face-Ripper guy in the Fort Dungeons depending on where you teleport him.
I tried to follow him in the Marshes where he would die against undeads or the flaming pigs i assume, but the way was clear.
[Spoilers!]
Eventually he got to the area where the player fights the Void Deep Dweller and he automatically fell dead. So conclusion is, you can't save him but it was nice to actually see how far his pathing went
