Here in WI it would not be a legal firearm for most hunting except small game (rabbits, squirrels, etc.) To use a handgun here in WI for deer (for example) it must have a minimum barrel length of 6" and fire rounds of a minimum fps rating. There are no Glocks that meet those criteria.
Now -- WOULD I use my Glock for hunting? You betcha! My 9mm would be a bit light for deer, but I could easily see using it for rabbit, squirrel, fox, and other small animals.
Side note: I do use a handgun for deer hunting. I use my Desert Eagle .44 mag. Problem is: I haven't had a buck walk anywhere near me since I've been carrying the DE. It's still a buck virgin.
I have a G-20 with stock length barrel, and also a 6 inch barrel. It came as a set from Cabelas. In Washington it is legal to hunt with a handgun, just haven't gone hunting since I bought it. Next time I go I intend to try it out though.
The buffalo bore uses a 255 grain hard cast bullet in the 45 super. The 45 super uses a 451 detonics case design that is shortened to the ACP case length. It has more strength in the case head area and can withstand the near 40,000 CUP it can produces. For a 230 grain fmj, it will usually be 200-250 fps faster than the ACP and about 200 # more energy. I'm pretty sure the capacity of the case is not increased in any way.
The outside dimensions are identical. The difference is the case thickness in certain areas. You would need a heavier recoil spring to prevent damage. It's like a 45 ACP ++p++. In a 1911, I would want to be very sure that the chamber would stand up to double the CUP it would normally see. Someone makes a Glock conversion for 45 super. 6" barrel with compensator, fully supported chamber, recoil assembly, etc.