In a large skillet, melt butter over medium-high heat.
Add sausage and cook 5-7 minutes, breaking it up with a spatula as it cooks.
Add shallots and garlic; cook 1-2 minutes, until garlic is fragrant.
Add Italian seasoning, nutmeg, salt, and pepper and stir about 1 minute to bloom the spices.
Add white wine; cook until almost dry.
Add chicken broth, pumpkin purée, heavy cream, and grated Parmesan; bring to a boil.
Add kale and gnocchi. Cover, reduce heat to maintain a gentle simmer, and cook 15 minutes.
Uncover and mix thoroughly, scraping up any cheese that settles to the bottom. Adjust salt and pepper.
Serve immediately, garnished with additional Parmesan.