I'm biased because I've seen several of your bikes up close, and you have some fabulous examples. In that context, your Gios doesn't move me as an icon in your collection. Restomod to ride or let it go, I'd vote for the latter.

You note it's not ultra rare. Many bikes have come and gone through the basement. Always, always another cool bike emerges before you know it, so don't sweat passing one along. For my taste, the only Gios I'd want is one with the coins, so if it were mine, I'd sell and prolly not put much effort into the patina - sometimes patina brings more than a refurb'd bike as others see the potential. The market is what it is - if it's high, you are buying and selling high. If it's low, as many perceive today's market for vintage steel, sell low, and buy another low. As long as you are staying in the market, it doesn't matter much what current market conditions are. Over time, you have winners and losers, keep churning and things tend to even out over time. And most of are not in this to make money or even break even, it's our joyful hobby, and that has lots of value. You did say you need to reduce the number of bikes, the original condition ones will be easiest to sell, and the Gios name has some cachet, ditch it I say...