GSF are prolific and will make good forage mainly for LMB who are effective predators of them. GSF relate strongly to shallow water habitat that serves as very good refuge for them. This in turn helps shelter them from certain types of predator behavior.
They could easily have an extended spawning period that spawns the summer depending mainly when the individual reaches maturity. The spawn event for them is 59F to 82F thus spawning period can be spread out over the summer.
GSF often do not grow real fast so YOY are usually 1"-1.5" by end of the first summer; maybe 3" in southern areas such as TX. Second year with abundant food expect some of them to be 5"-6".
I think your main concern is the tendency to get too many GSF and other sunfish to the point they overeat the natural foods available and stunting occurs. Stunting and slow growth is common in ponds with GSF and a low density of bass predators. If you are catching more GSF in the traps than BG I would start removing GSF so remaining ones grow fast. One option is to place some 1yr old gsf (2.5"-3") in a cage (3-5/cuft) and feed them pellets for two years when they should be 7"-8" long. GSF readily adapt to life eating pellets in a cage. You may have to initially soften the pellets to train the GSF to eat pellets. I just finished a pellet feeding study using a high protein pellet 41% and the new Optima fish food. GSF grew significantly better on the Optimal fish food. Get some next year shipped to your door if you want to grow big GSF fairly quickly.
http://forums.pondboss.com/ubbthreads.php?ubb=showflat&Number=426239&page=1 
