Currently there are 5 native Macro Prime lenses for Panasonic GH4 and all of these lenses are autofocus (AF) type.
Panasonic GH4 doesn't have a sensor based image stabilization system but 3 of these Macro Prime lenses features optical image stabilization.
Since Panasonic GH4 has environmental sealings (Weather Sealing), you may like to couple your camera with one of these 2 Macro Prime lenses with Weather Sealings.