Hopefully someone else can chime in with more but the closest to shrimp gumbo I could find is this Turkey & Shrimp File Gumbo at House of Blues (in DTD):
Cajun Smoked Turkey and Shrimp File Gumbo -White Rice, Diced Tomatoes and Lemon. Cup $4.50 Bowl $6.25
BTW Epcot Food & Wine go-ers this year also had an offer of "Seafood Gumbo - $3.75" at the Louisiana stand.
If you can make it over to Universal CityWalk, Emerils has a Seafood & Andouille Gumbo, and Pat O'Briens has Shrimp Gumbo - "Tender Shrimp in a hearty broth filled with Andouille Sausage, Okra and White Rice.
Served with Oyster Crackers.
Cup 4.95 Bowl 5.95"