quote"I'm trying to think of a gas appliance that would not have electricity run to it and drawing a blank. Maybe a gas fired pool heater??"
For one, they make gas instahot heaters that do not have electrical controls at all. One type I have seen used recently you had to light a pilot lite in it. And one I came across about 2 years back had a device that sparked and struck a flame when the water flowed thru the pipes. It used the flow of the water . I used to see hot water heaters with constant pilot light years ago, but not lately. Most of those require 120 volt ignition.