Bake biscuits according to package directions or your recipe and keep warm.
In a large skillet over medium-high heat, cook the breakfast sausage until browned and crumbled, about 8-10 minutes.
Sprinkle flour over the cooked sausage and stir constantly for 1-2 minutes until the flour is absorbed and lightly golden.
Gradually pour in the milk while whisking constantly to prevent lumps from forming.
Add salt, black pepper, and garlic powder, then bring to a simmer.
Continue cooking and stirring frequently until the gravy thickens to your desired consistency, about 5-7 minutes.
Split biscuits in half and ladle generous amounts of sausage gravy over the top before serving.