Looks like you got all the fun stuff

... :doh: Just look at the avatar... :doh:
I thought there was not a GEM in the newer models (04+? or something). I think everything runs through the cluster? I could be wrong but IIRC all of that good stuff is stored up there, thus the reason for so many clusters messing up. (or the "GEM" is incorporated in there)
If you have time, and your that worried about it.. Double check everything runs correctly. Check the grounds etc. The only time this happened to me I went through two batters

and it took about four months to determine it was just my fog lights that were messing up and the only way we figured it out was because we drove 90 miles and smelled wire burning, sure enough the wires to the fog lights were too close to something hot and sent the entire electrical system hay wire.
But nothing else is turning on by itself, or malfunctioning huh?
As far as I know there are A LOT of things that feed it, so many that you have to get a wiring diagram from Ford (from someone that has some good access, not your average tech). My uncle is one of the big dogs in the innovation department in Detroit and it took about 3 weeks just to get some sort of an idea of what powers that relay and what goes in and out of it (before we discovered the problem). From what I learned, if something pre-relay is malfunctioning (and its not obvious what it is), you have to get the truck hooked up to a laptop and have someone run tests through it, which apparently less than +/- 5% of Ford delearships have.
Once more, if it really concerns you, and if you had the time, I would start unhooking your bad ass electrical toys one by one and see if anything solves it.