You can't buy GM seeds on the market so your corn is either hybrid or OP. Have you asked Park's?

You can buy Bt Sweet corn--which is genetically modified.

Mirai is not GM, just a hybrid.

Where did you find gm corn on the regular market? It takes a lot of paperwork and permits for commodity farmers to buy it direct.

One of my seed catalogs had it listed--can't remember which one, but it was a company that generally sold larger quantities for farmers. There was a note that you had to fill out a form in order to get the Bt seeds. I never attempted to get any, so I don't know how difficult it would be for the average gardener to buy the seeds. Mostly it was just a surprise seeing GM sweet corn being sold for direct human consumption (as opposed to field corn).

Parks Seed along with some other home garden seed providers sell Mirai. Mirai is a hybrid according to Park.