Cook spinach according to package directions; drain and set aside.
Melt butter in a medium saucepan over medium heat; add garlic, and sauté 1 minute. Whisk in flour until smooth, and cook, whisking constantly, 1 minute. Gradually whisk in milk, and cook, whisking constantly, 2 minutes or until mixture is thickened and bubbly.
Add cheese, hot sauce, and Creole seasoning; whisk until cheese is melted. Stir in spinach, and cook until thoroughly heated. Serve immediately.