The Lumix GF series cameras don't support USB tethering, as far as I know. Later models have WiFI for use with a smartphone App and cloud services.
Sorry I can't help with your GH5s question.
Hi Robert, Jaseem
I pulled the code for the libgphoto2 (lumix) library and indi gphoto driver a few months ago, and after some learning (!) and a few modifications to both, I now have ekos/indi working with my Lumix GF7.
I'm running indi on a raspberry pi 4, and I can stream the live view, capture images in both raw and jpeg with my camera connected to my wifi lan.
Thanks for a great effort in pulling all this together!
I still have a couple of bugs to iron out before I commit the code, but I thought I would let you know in case someone else is working on this too.
The changes will need to be in both libgphoto2 and indi gphoto driver for this to work, and this is the first time I've committed anything to either of these projects so please let me know if there's anything I should be aware of.