In the future in order to cool down large pots of hot liquids, fill one of your sinks with water and ice, and stir the stuff every once in a while, this is the method in the business.
I do this a lot when I'm in a hurry for things to cool a bit faster. I don't do it with gumbo because my pots are so big and heavy that I have a hard time moving them and sometimes have to put half in another pot to cool just so I can carry them to the fridges to get them in.
I know folks who put ziploc bags of ice in the middle of a pot sort of like the frozen liter bottles, but several have spoiled theirs that way, so be careful about that.
I never put the lid on the gumbo when I put it in the fridge for the first time.