Hmm, I made some progress here:
when I attach to my docker and check the content of my local mount path, I can see the content of my g drive:
ls /gmount will give me my gdrive data. So the mount is actually working.
Now, as I'm inside a docker, I've also map the path /gmount (inside my container) to a path on my host: /home/cyril/rclone2/gmount
But when I do ls /home/cyril/rclone2/gmount (on the host), the folder is empty.