Posted: 30/09/2012 at 07:41
I always bag the flowers on plants when I'm going to save seeds just to guarantee against cross-pollination. Once the fruit has set I remove the bag and tie some coloured thread to the fruit (or truss) to remind me it's for seed-saving. Sometimes I completely overlook the thread when harvesting and eat the dang things!
If GS had some fungus on the leaves it won't have impacted on the fruit or its seeds. The only real risk with saving seeds in terms of disease is perpetuating seed-borne disease. I doubt your GS suffered any such.
Anyway, it's always a good idea to ferment the seeds in the saving process. Some people just remove the seeds and dry them. Fermenting them does two important things: (1) the gooey seed gel, left in place, can inhibit germination and fermenting removes it quickly and easily; and (2) it kills off pathogens that might be lurking.