All GH4 camera profiles use the factory default camera settings unless specified otherwise.
The exception is the CinelikeD "Low Contrast" setting, which uses Highlights-5, Shadows+5, with all other settings at default. Contrast may also be reduced in-camera as desired but you will need to correct for this with the Film Convert color correctors afterward.
Color range is set 0-255 for all profiles.
16-235 will result in high-contrast images that will need to be corrected in post.