Suggestion Proposed: Use a Google recognizable button and wording to make it clearer and inline with the options seen on the Internet. "Sign in with Google" wording and images would be great.
Our school is using Google for authentication and the login screen offers a 'G login' button. To new users that button is not understood to be Google. It lacks the familiar Google colors and wording. I was unable to find a graphic on the Internet to use in our internal documentation.
https://developers.google.com/identity/branding-guidelines