Fujifilm GFX 100 has a Fujifilm G lens mount and currently there are 9 native lenses available for this mount.
GFX 100 also has a sensor based image stabilization system which means that all of these lenses will be stabilized when used on GFX 100.
Since Fujifilm GFX 100 has a Medium format sensor, it has a focal length multiplier of 0.79x so you have to multiply lenses original focal length with this multiplier to find the Full Frame equivalent focal length of the lens when mounted on GFX 100.
You may also also be interested in these:
Fujifilm GFX 100 Lenses with Image Stabilization
Fujifilm GFX 100 Lenses with Weather Sealings