Jeff :

Almost all ponds and their contents can be managed around. In your situation GSF are the dominate sunfish in the pond and are doing very well. That is not the case in most ponds with GSF. I can't imagine anyone here saying get rid of them in your situation. Lets see what others recommend. There are a number of options but they all depend on your goals. Its your pond and your goals -- learn how here but ,do it your way , but most of all enjoy the journey !