Not GP, but also fully aphant: yes, I have visual dreams. I is very hard for me, to tell whether I also hear things in my dreams, but I think yes. For other senses, I am quite sure that I don't experience them while dreaming.

Same here. The fact that I see things in my dreams is one of the reasons I feel I can know for certain I don't see things when I "imagine" things.

that made me realize I never once thought of whether I was hearing stuff in my dreams.