Prepare your ingredients by chopping the chicken thighs into bite-sized pieces, slicing the sausage into rounds, dicing the bell peppers, and mincing the garlic. Keep everything within easy reach for smooth assembly.
Add the chicken, sausage, diced peppers, minced garlic, paprika, thyme, and cayenne to the crockpot, layering the ingredients evenly. Pour in the chicken broth until the ingredients are just covered, then give everything a gentle stir to combine.
Cover the crockpot and set it to low. Let it cook for 6 to 8 hours, allowing the flavors to meld and the chicken to become tender and juicy. During this time, the house will fill with smoky, spicy aromas.
After 6 hours, check that the chicken is tender and easily shreddable. If it needs more time, continue cooking until it reaches that perfect softness.
About 30 minutes before serving, stir in the sliced okra. Cover and cook until the okra is soft and the broth has thickened slightly, creating a hearty, slightly slimy texture characteristic of authentic gumbo.
Once the okra is tender and the flavors are well combined, stir in the file powder, if using, to add a subtle earthy flavor. Taste the broth and adjust salt and pepper as needed.
Serve the gumbo hot, ladled into bowls, with optional garnishes like chopped green onions or a dash of hot sauce. Enjoy the comforting, smoky flavors with a side of rice or crusty bread.