Panasonic G85 has a Micro Four Thirds lens mount and currently there are 86 native lenses available for this mount.
G85 also has a sensor based image stabilization system which means that all of these lenses will be stabilized when used on G85.
Since Panasonic G85 has a Four Thirds sensor, it has a focal length multiplier of 2× 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 G85.
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Panasonic G85 Lenses with Image Stabilization
Panasonic G85 Lenses with Weather Sealings