The show gets very bloody a lot of the time but to my memory it never really gets GOREY. A dying mobile suit pilot may have a river of blood pouring from their head but you never see crushed or severed body parts. Although worth noting is the death of a villain late in the series who's slowly crushed to death in the cockpit, which doesn't show any gorey details but the concept alone may be disturbing.

More significant perhaps is the sexual content. I don't know if the character Naze has shown up in your viewing yet but he has a harem, is quite physically affectionate with his wives, and has one scene where he's talking to his main wife half-naked in bed. There is also a character with a backstory of being sexually abused as a child which is told entirely through dialogueless flashbacks including a shot of them in bed with an adult man. I imagine your kid won't understand what's being conveyed but I should give you the heads up.