Unless you have 100 RACERS looking to take part, there is no reason to start another series. To my knowledge, that’s about how many race at the Gold Cup events.
If WKA tracks, such as G&J, Michiana Raceway Park, and others in the area don’t provide club classes for Gold Cup classes, then creating another series won’t help it grow either. In order for something to grow, it has to have a good base. In karting, that base is the club level.
Don’t get me wrong, it could work, but I just don’t see the support to make it happen.