Preheat your oven to 425 degrees F and line a baking sheet with parchment paper.
In a large bowl, whisk together the gluten free flour, baking powder, sugar, garlic powder, onion powder, salt, and cayenne pepper. Add the cold cubed butter and use your fingertips or a pastry cutter to work it in until you have pea-sized crumbs scattered throughout.
Add the shredded cheddar cheese and toss to coat in the flour mixture. Pour in the cold buttermilk and stir with a fork until a shaggy, slightly sticky dough comes together. Do not overmix.
Using a medium cookie scoop or tablespoon, drop rounded portions of dough onto the prepared baking sheet, spacing them about 1 1/2 inches apart. You should get about 20 to 22 biscuit bites. They should look rustic and rough, not smooth.
Bake for 13 to 16 minutes until the tops are golden brown and the biscuit bites are set. They should be puffed and slightly cracked on top.
While the biscuit bites bake, prepare the garlic butter topping. Stir together the melted butter, garlic powder, chopped parsley, and a pinch of salt in a small bowl.
As soon as the biscuit bites come out of the oven, brush each one generously with the garlic butter mixture. The butter will soak in slightly and give them an incredible flavor and shine. Serve warm for the best experience.