I have built many gallery spaces, over the last 15 years, They all have been drywall. My latest gallery has Very high ceilings which we used drywall floor to ceiling , good taping and sanding and a couple of coats of quality white paint.
We splurged and made the floors Bamboo and the space looks great.
If I had not splurged on the floor, I would have used a system for hanging prints.*Akora* I believe, very ingenious method of hanging prints, slick looking but very pricey.
After each show we putty the holes that were made and repaint the walls. We change the shows 4-6 times a year so this is not too much of a hassel.
good luck with your space