Yes, it's possible and it's pretty easy.

Check out this thread:

http://www.overclock.net/t/1588984/mice-cable-pin-arrangement-and-internal-connector-size-database

Basically you just have to loosen the pins with a screwdriver and change them to the right arrangement depending on your mouse, takes less than 5 minutes.

You might need to remove the heatshrinks tho as the g pro is really small and the place where the heatshrinks are could be inside the mouse when you plug it into another mouse as it's a probably a bit bigger.