Preheat oven to 350 degrees F and coat a 9×13 baking dish with cooking spray. In a small bowl, combine the garlic powder, oregano, cumin, thyme, paprika, salt and pepper. Mix well.
Place the pork loin on a large dish or plate and rub the seasoned mix all over the entire surface. Heat the olive oil in a skillet over medium heat and add the pork loin. Cover and cook on each side for 3-4 minutes, or until seared and golden in color.
Place pork in the prepared baking dish and bake in the preheated oven for 30 minutes, or until cooked through and no longer pink in the center (meat thermometer should read 145 degrees F). Serve immediately!