The Google Guardian feature connects parents and guardians to students Classroom information.
Because guardians are not part of the student’s School domain they must receive an invitation using their own email address. Once they accept the invitation they become Classroom guardian. realsmart sync with your MIS to automate the process of getting those parent email addresses into google
Before starting the setup process contact realsmart support team to ensure the correct APIs are in place- Once checked and confirmed follow these simple stepts.
https://realsmart.groovehq.com/help/automatically-sync-parents-and-guardians-to-google-classroom