Preheat oven to 400˚F.
Lightly grease a 9x13 baking dish with cooking spray and set aside.
Prepare gnocchi according to directions on the package and drain.
Prepare bacon; set aside.
In the meantime, melt butter in a large 12-inch skillet set over medium heat.
To the melted butter add flour, garlic powder, salt, and pepper; whisk constantly for 1 minute.
Slowly whisk in the milk and broth; whisk until well blended.
Bring mixture to a boil, and continue whisking until mixture is creamy and thickened.
Remove skillet from heat.
Stir in cheese, half of the crumbled bacon, and chives. If the sauce is too thick, stir in a little more liquid.
Stir in the gnocchi.
Transfer mixture to prepared baking dish.
Top with parmesan cheese.
Bake for 20 minutes, or until top is lightly browned.
Remove from oven; let stand a few minutes.
Top with remaining bacon and serve.