Pat cube steaks dry with paper towels and season both sides with salt and pepper. In a shallow dish, whisk together gluten free flour, garlic powder, onion powder, smoked paprika, salt, and pepper. In another dish, whisk together eggs and buttermilk.
Dredge each steak in the seasoned flour, shaking off excess. Dip into the egg mixture, then back into the flour, pressing firmly to create a thick coating.
Heat 1/2 inch of vegetable oil in a large cast iron skillet over medium-high heat until it reaches 350F. Fry steaks 2 at a time for 3 to 4 minutes per side until deep golden brown and crispy. Drain on a wire rack set over a baking sheet.
For the gravy, pour off all but 3 tablespoons of pan drippings. Whisk in gluten free flour and cook for 1 minute. Slowly pour in milk while whisking constantly. Cook for 4 to 5 minutes until the gravy thickens. Season with salt and pepper.
Serve chicken fried steaks immediately with the cream gravy poured generously over the top.