Okra and filé powder are both traditionally used as thickeners in gumbo. Use one or the other, or both, but it's not really gumbo if you omit them both. Okra has a slightly slimy texture that some love and some revile, while filé powder has a subtle tea-like flavor and will thicken the cooking liquid when stirred in at the end of cooking.
This website provides approximate nutrition information for convenience and as a courtesy only. Nutrition data is gathered primarily from the Spoonacular Database, whenever available, or otherwise other online calculators.