I went to get my G last year, and I wasn't even allowed to leave the parking lot because of a one centimetre crack in the windshield that was right below the wiper blade. I got an automatic fail. I'm scared to take my car because it is standard and probably don't drive the "textbook way."
I better go again soon as my 5 year window expires in July...so thanks for asking this question, cause it helps me out too!
