Google Classroom Sync to GradeBook is now available for use. This tool will allow you to sync your grades in Google Classroom back to GradeBook without manual copying. It will be a big time savings for teachers grading in Google Classroom. The sync is a one time transfer and must be repeated for each assignment if updates are made. This was not enabled in August due to some software issues that needed to be fixed.
See the video link below for complete details.
Please let me know if you have any questions (after you have watched the video 
).