I have Google identity with a domain example.com and have created a group, say my-admins@example.com. I can create users a-user@example.com and say another-user@example.com and add them to group my-admins@example.com.
I have a Google Cloud organization example.com and have successfully added my-admins@example.com and assigned it the roles I want (e.g Organization Admins).
It's possible for me to add google accounts, e.g googleaccount123@gmail.com as principals to my organization and assign them roles, but I can't seem to add them to the my-admins@example.com group.
Are my Google identity groups always scoped to users with the same domain? If so how do I get to a place where I can manage a mixed group of example users and google accounts?