to be fair, age ratings are not good representations of what age the audience should be
As an example, three G rated films include:
Disney's The Black Cauldron, a gothic fantasy film about a skeletal warlock who raises an army of the dead to kill people just because
Rescued by Ruby, a documentary on Netflix about a K9 officer that includes animal abuse, murder, and the near death of a child
And Flow, a really good movie that is about a cat meeting other animals and none of them talk or get hurt at all.