Cook gnocchi in pasta pot until they float to the surface, about 2-3 minutes. Drain.
Melt butter in skillet over medium heat. Stir in the garlic, and cook until garlic has softened and is beginning to turn golden brown, about 4 minutes. Stir in the sage and salt for a few seconds, then add cooked gnocchi. Toss gently with ¼ cup of parmesan cheese and pepper. Sprinkle with remaining 2 tablespoons parmesan cheese to serve.