Yes. I use the VIRB (in the Garmin housing) and mount it on my helmet, suction cup & extension GoPro pole ... all past Hero mounts I had handy.
So you can use past GoPro mounting systems. But not the actual camera housing.
The lens is wide angle. Depending on your video resolution setting, it allows for 1.5x or 2x times zoom. This is allowed in 1080p as an example, but not in 4k. I don't believe this feature is available in any photo mode.
I shoot 4k,so I don't zoom.
Good luck - James