The only reason the thought crossed my mind is because the stock FLARM GPS antenna wire is long enough to make the run, with distance to spare. In fact, I'm thinking about putting it BEHIND the luggage area (i.e. behind the spar) where it is completely out of the way (I didn't shorten the stock GPS antenna wire, but thought about it many times). Right now this is the only GPS antenna I have, but I will add an additional antenna for ADS-B at some point (maybe after the Reno show if anyone is offering any discounts - hint, hint for anyone listening). With just two antennas it doesn't make sense to try to put in splitter. Mounting will be the next issue. I was thinking about a couple of simple fiberglass cubby holes against the inside roof of the glider for the antennas to slide into (separate by some small distance).