What's the difference in corn gluten meal and HCM. Can you use CGM to make cornmeal juice?

Sure, all corn products, (even corn animal feed products), can be used to make a great corn protein tea product. Also all corn products can be used as a generic fungicide product.

However CGM is normally used as a weed suppressant product for lawns.

Horticultural corn meal, or as I like to call it, ordinary corn meal, is ground up corn. Corn gluten meal is processed further by grinding it finer and removing the outer part of the corn kernel for further use in other products. The remaining gluten is what is called corn gluten meal. It used to be used only as a protein supplement for animal feed.

I live in Costa Rica, and they seem to only sell corn flour (the white, fine one that tastes like nothing, no matter what you cook with it), but I am growing corn and it's ripening these days. What about grinding fresh corn? Are the chemical structure and properties the same?