I wouldn't eat it. It sat too long in the danger zone of 40˚F - 140˚F. CDC, USDA et al recommend that food be left out no more than 2 hours.
There are better ways to cool food. 1. break it up into small batches 2. put the pan containing the food into a cold water bath to quickly cool it. 3. if it's a small quantity, put it directly into the fridge or the freezer.
Probably. Reheat it to the boiling point and then let it simmer for at least ten minutes.
If food that should have been refrigerated was left out at room temperature overnight, it should be discarded.
Gumbo should not be left unrefrigerated for more than 2 hours, or less if the ambient temperature is quite warm. Split it into smaller portions less than 3" deep to facilitate cooling.
Freeze it.
To reheat food, you should use a microwave, oven, stovetop, or toaster oven.
OKRA----------No, no no! Many people put okra in their gumbo, but it is definitely not always an ingredient. The only ingredients that are part of any gumbo...or should be if it's true gumbo...are onion, celery, bell peppers and roux.
Bagels harden quickly when reheated in a microwave oven. The best way to reheat a bagel is in a toaster or a toaster oven.
The most popular varieties of seafood gumbo are Cajun Seafood Gumbo, Chicken and Sausage Gumbo, Shrimp & Crab Gumbo, Mardi Gras Gumbo and Creole Gumbo.
My personal taste has me sprinkling file over the top of my gumbo...not cooking with it. The sassafras (file) does it's work as the Gumbo cools, so add after cooking. 1/2 tsp per quart should be sufficient to thicken and flavor gumbo or soup.
Reheat a pie in the oven for about 10-15 minutes at 350F until it is heated through.
Reheat quiche in the oven at 350F for about 15-20 minutes, or until heated through.
To reheat a smoked ham for optimal flavor and tenderness, it is recommended to reheat it for about 10-15 minutes per pound at a temperature of 325F.