I was diagnosed to be having this problem some time back. I am learning to live with it and am keeping the diabetes under control. This Deepavali I tried this:
With the ready mix gulab jamun powder, follow the regular procedure up to deep frying the jamuns. Put them in the jeera (sugar-water heated solution) for others. For those who could not take full sugar, keep the fried jamuns separately. When you want to taste them, put the required quantity in hot water. After water is absorbed, take the jamuns away, sprinkle them with sugar-free or equal etc covering them fully. Enjoy your gulab-jamuns. For added sweetness, you can put some sugar-free or equal in the hot water also.
Disclaimer: I am not a health food expert - but I myself was the guinea pig and I live to tell this story!