Per my post last December, we have a Gemini, and have that same issue. It has been trouble shot, several times by the dealer, and me, have checked every possible circuit, checked the shore power at storage, all is good. Changed out the GFI, still trips, but inconsistently. It has now gone about two months without tripping, but its done that before, then for some reason will start tripping daily for awhile, then not. The only pattern I have been able to see, so far, it never seems to trip while we are out and the electrical system is loaded, or at least it hasn't yet. I haven't been able to make sense of it, as of yet.
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