Washer/dryer in the garage
I don’t know Florida but in Oregon you would , I believe if your water heater Is elevated your dryer would be covered by the same requirements because of possible flammable fumes from the garage, when the gas burner starts up. I recently raised my washer and dryer (both front loaders) 13-14” off the ground because of washer issues and my wife loves the height. 
I would raise it even if not code after doing it.