Heat the olive oil in a large skillet over medium heat.
Add the minced garlic and chopped sage. Sauté for about 30 seconds, just until fragrant.
Add the milk, broth, pumpkin puree, nutmeg, a pinch of salt, and black pepper. Stir well until the pumpkin is evenly incorporated.
Add the gnocchi to the skillet and stir gently to coat it in the pumpkin sauce.
Reduce the heat and simmer for up to 5 minutes, stirring occasionally, until the gnocchi is tender and the sauce has thickened slightly.
Serve the creamy pumpkin gnocchi hot, topped with grated Parmesan.
Taste and add more salt and pepper if needed.