Currently there are 21 native Telephoto Zoom lenses for Panasonic GH5S and all of these lenses are autofocus (AF) type.
Panasonic GH5S doesn't have a sensor based image stabilization system but 15 of these Telephoto Zoom lenses features optical image stabilization.
Since Panasonic GH5S has environmental sealings (Weather Sealing), you may like to couple your camera with one of these 10 Telephoto Zoom lenses with Weather Sealings.