Preheat oven to 350°F (177°C).
In a medium-sized bowl, whisk the eggs.
Add the half-and-half, salt, and pepper to the eggs and mix until fully combined. Set aside.
Add the cooked chopped bacon to the bottom of the prepared gluten-free pie crust. Top with 1 cup of cheddar cheese and sprinkle green onions over the cheese layer.
Pour the egg mixture over the filling layers.
Sprinkle 1/2 cup of cheese over the top of the quiche.
Bake for 20 minutes, then cover loosely with aluminum foil and bake for another 20-30 minutes until a knife inserted in the center comes out clean.
Let the quiche cool for 5 to 10 minutes before slicing and serving.