This was my suspicion too. Their page and Amazon (illegally) suggest salt is the only ingredient, but the Walmart listing show it contains Sodium ferrocyanide.
My own safety concerns aside (this stuff literally degrades into (a small, but not insignificant amount of) deadly hydrogen cyanide gas in your stomach), it is made purely of mined and petro-derived chemicals. No organic production method is used these days.
So aye, it seems the 'non-GMO' is in fact meaningless in this case.

Headline: MAMDANI TO CLOSE LAST EMERGENCY MIGRANT SHELTER
Further down: actually only the last established by emergency measure "migrant-only shelter"
Further: transitioning migrants to safer, more regulated shelters. All residents relocated to beds. Sites in breach of standards will be manageably reduced.
I'm ready to slam the guy for being a two-faced lib, but shall we wait until he actually does the bad thing?