Anytime you can choose healthy fresh food - fruit or otherwise - you are doing your body good.
It's just important to keep in mind that even fruit can cause you to be more hungry if you aren't careful.
I think the key to what you are describing is that you were exercising at the time - taking in something like a banana during that would actually do exactly as you describe - boost your sugar level when you need it the most, aka throw some fuel on the fire.
But again, I'm just a guy that has had tremendous luck with monitoring my GI and my hunger and have a few really knowledgable friends that have helped me along the way.
So are you saying that if you eat something with a high GI then your blood sugar rises, and this makes you hungry? This seems counterintuitive as high blood sugar usually makes you not-hungry?
Also a simple hack to lower the glycemic index of anything you eat is to consume it with additional fat or fiber. So a salad\baby greens with olive oil or the higher percent fat nuts like Hazelnuts, Walnuts, Macademia & Brazil.