A previous owner installed a beautiful rear arch on our Gemini 3200. It serves to hold not only our solar panels, but fishing rods, boat hook, life sling, and can it can even hold up our outboard engine. A pulley system has been created for this later function. We've also used the rear arch as our on board gym for doing pull ups.
The photos are provided for others considering adding arches to their Gemini sailboats.