Now that we have added Autodiscover for G Suite, we have eliminated the need for G Suite Display keys during the provisioning process.
This means that, just like for Office 365 users, the provisioning process in the admin portal is completely optional. You can begin directly from your tablet if you like.
Once you sign in on your tablet, you will see a list of Resource Calendars associated with that G Suite tenant. This should be the same list you see when looking for rooms to add to calendar events in Google Calendar.
You then select the calendar you wish to display, and you're all set!
You can optionally add an "owner email" to the display, to configure styles and other settings from your Admin Portal.