That depends how it's attached to the cement. eg, Is it on 'furring' or is it nailed directly onto the cement.
If you expect your shower to last, then remove that drywall and re-finish it with concrete/fibre board. It's so much better than drywall you wouldn't believe it. Nobody professional does drywall around a shower anymore.
NO. -Concrete may be a 'dry' wall, however it is NOT Drywall.
If the drywall is directly onto the concrete, drill into the concrete and use a shield and screw or there is a concrete screw called Tapcon that screws directly into the concrete without a shield and holds much better. If the drywall is on furring strips, either mount the banister on the strips or go through the strips into the concrete.
You use standard 1/2 inch drywall .
No, it must be screwed. - But there are many varieties of excellent concrete board now. -
The best way to remove drywall is to start by cutting the drywall into manageable sections using a utility knife or drywall saw. Then, use a pry bar or hammer to carefully remove the sections from the wall. Be sure to wear protective gear and be cautious of electrical wiring or plumbing behind the drywall.
NO, you shouldn't do that. There are many fibre/concrete products that are way better.
No, it isn't . The wood and drywall are NOT contaminated.
There is no effective way to do this without destroying the surface of the drywall. It is more cost-effective to simply replace the drywall.
You are supposed to fur it out first. - That means a thin wood frame, usually 1x4 on the concrete FIRST. - It is not customary to apply drywall directly to a concrete basement wall.
Rat urine will actually saturate the drywall. Drywall is very porous. The best bet is to cut out and replace that section.
If it's on drywall, then you cannot remove it.