Mounting into Drywall, if fairly new, and of good quality, I can see. Unfortunately, new can be ascertained. Quality, thickness and possible moisture issues are another thing. 2X4 studs - seem to be the more possible way to go. But, there's always a but, what's the spacing re aligning for mounting? A cross piece from stud to stud possible?
Wife wants to know what out of the box sex is as well?