Is there a reason not to nail up drywall?
Nobody uses a pneumatic nailer for drywall. And in a world where shortcuts are revered, that has to tell you something.

You know this already, but screws are the gold standard. They stay put and they pull the drywall as close to framing as possible. Badly set screws can pop, but properly set ones don't. 

Nails were common in the past, but they were usually ring shank (for holding power) and with a slightly bigger head than a framing nail. (They also had a propensity to pop as framing dried out, in spite of the fancy ring shank.) 

If you had to use nails, the trick is to set them just slightly below the plane of the paper without cutting through the paper. The dent from a hammer made this work. A pneumatic nail is either going to be set too deep (ripping the paper, and being out of the way of the taping knife) or set too high (not ripping the paper, but being in the way of the taper). There's really no way to get the dimple you need with an air nailer.

If you are seriously only looking at a drill, get an impact driver. You'll get way more control driving screws. (And impacts are great for a lot of other stuff as well.) If you have a ton of rock to put up, consider getting an actual drywall screwgun.