(Originally referred to the American film-rating system, in which "G" stands for "general admission".)
1. Appropriate for all ages, with no offensive content such as violence, drug use, profanity, or sex acts.
2. Sanitized or altered to remove offensive content.
1. Just because a movie is G-rated, that doesn't mean it's a kiddie show: ever see _The Sound of Music_?
2. I'd better tell you the G-rated version of what went on at the school dance; my mom is probably listening in!
Another way of saying that something is gangsta
That game is G-rated for Gangsta.