I doubt the school gets that info. Very seriously doubt it. If they did, all they'd care about is that you don't carry while volunteering--and they almost certainly would take that stance. You may find a rural district here and there in CA that wouldn't, but those would be few and far between. It is less a political/philosophical issue with them than a perceived liability issue, at least at the district level.
“Every reform movement has a lunatic fringe.”
― Theodore Roosevelt