[cguZZMan]

The plugin's path that lists a directory for pictures is something like

python:
plugin://plugin.googledrive/?action=_list_folder&content_type=image&driveid=11111&item_driveid=22222&item_id=33333)

where
driveid is the id of your account. you can pull it from the accounts.cfg file in the addon_data folder
item_driveid is the same as driveid.
item_id is folder id in google drive. You can get it from the kodi logs or may be is more easy to go to the google drive page and after opening the folder you want, the url will be something like https://drive.google.com/drive/u/0/folders/33333. The last part is the item_id.