I wouldn't contact the school, but I'm pretty horrified admin are letting these posts sail through without a thought. They've got approval on so there's no excuse to allow this shit through. They need a rule about protecting minors - the stuff that's been shared about kids with none of their consent is pretty awful.
I think Gummy might not have full intellectual capacity so I would tread carefully, but she clearly needs more grounding in safeguarding both as school staff and a parent.