Set a large skillet or sauté pan (I used a large shallow dutch oven) over moderate heat with 1 tablespoon butter. Once hot and melted, add in the sliced sausage and cook until browned and crispy, about 5 minutes. Use a slotted spoon to transfer to a plate and set aside.
Add in the shrimp and season with 1 tablespoon of the seafood season. Cook, stirring often, until the shrimp have just turned pink, but not necessarily cooked all the way. Transfer to the plate with the sausage.
To the same skillet, add the onion, garlic, corn, thyme, bay leaf, and a pinch of salt and pepper. Cook until softened, about 3 to 5 minutes. Deglaze the pan with the wine, cooking until the white has just slightly reduced. Stir in the lemon juice and 1 more tablespoon of the seafood seasoning. Add the remaining 3 tablespoons butter and stir until melted and a smooth silky sauce has formed. Remove from heat and keep warm.
Bring a pot of water to a boil and salt heavily. Add the gnocchi and cook according to the package directions. Use a slotted spoon to transfer the cooked gnocchi to the skillet with the sauce. Add about 1/2 cup of the pasta cooking water along with the cooked sausage and shrimp from earlier. Give everything a stir and cook until just heated through and the shrimp have finished cooking. Sprinkle with the remaining tablespoon of seafood seasoning and garnish with parsley. Serve with lemon wedges and enjoy!