Skip the gel pads and go with a sacrificial disk bonded with closed cell acrylic foam tape, if you want something that actually holds and does not smear the dash. That way any residue stays on the disk and the textured vinyl never sees the mount directly. Clean thoroughly, avoid any silicone interior products on that spot, and give the bond some dwell time before you hang a that model off it.
I worried about getting it off later in a lease. Slow peel at a low angle, floss behind the foam, a little heat from the sun or a hair dryer, and the remnants roll off with alcohol. No greasy film, no print left in the texture. The key is picking a flattish area and not using a long wobbly arm that turns bumps into a prying force, otherwise even the best tape loses eventually.
