FEATURE REQUEST
Atlassian Cloud should support “Service Accounts” which can be used to integrate with other applications (such as being used for Google Apps integration with admin access to the customer’s Google Apps user domain) while not being allowed access to any Atlassian Cloud application and therefore would not count towards the customers user count and hence user licence limit.

PREVIOUS SUPPORT REQUEST
“The user that sets up Google App integration must continue to have Administrative access for your Google Apps domain. If their Administrative access is revoked, your Google Apps integration with Atlassian Cloud will stop functioning.”
https://confluence.atlassian.com/cloud/set-up-google-apps-for-your-site-744721645.html

So from that note, if the user that sets up our Google integration departs the company at some point and his user account is disabled/deleted then it sounds like our Google Apps integration will stop working, is that correct? So, if we instead create a “service account” in Google Apps that is not related to a specific user for this integration purpose, then will that service account require access to our Atlassian Cloud service and will it then count towards one of our user licences?

PREVIOUS SUPPORT RESPONSE
Yes, you got it right. If the user that set up GApps integration is disabled/deleted, GApps integration will stop working.
In order to set up the integration, the user would need to be a site-admin. Site-admin will be added to the user count even without any application access.