Mash the garlic powder, parsley, sugar, seafood seasoning, garlic and salt into the softened butter and blend very well.
Spread the garlic butter on one side of each slice of bread. Arrange the bread, buttered-side down, on a work surface. Layer four of the slices with a slice each of the American cheese, mozzarella and Gouda; be sure that the mozzarella is in the middle. Top with the remaining 4 bread slices, buttered-side up.
Heat a grill pan over medium heat until hot; brush with the oil.
Add the sandwiches to the pan. Cook until grill marked, 30 seconds per side, then transfer to a baking sheet. Bake until the cheese is melted through, 10 minutes. Serve immediately.
This recipe was created by a contestant during a cooking competition. It has not been tested for home use.