Update your Bookmarks to https://sites.google.com/view/gam--commands/home
This will show the cloud printers that are shared to the user you run the command as. It will include the Printer ID that is needed in the other commands.
gam print printers todrive
It looks like you cannot change the ownership of the printers, if a printer already has an owner.
gam printer <printer ID> add <user | manager |owner> <user email>
gam printer <printer ID> remove <user | manager |owner> <user email>
gam printer <printer ID> showaclÂ
gam info printer <printer ID>
To check the online state
gam print printers extrafields connectionStatus,semanticState > printers.csv
gam print printers extrafields connectionStatus,semanticState todrive