Yes, those sound about right. I try not to eat any of those things. Glycemic Index is really complicated because it can be affected by what else you eat with t

Yes, those sound about right. I try not to eat any of those things. Glycemic Index is really complicated because it can be affected by what else you eat with the food (like putting milk on cereal), or how you prepare the food (some people think toasting bread can lower the GI). You're right that "how much sugar per serving" is an oversimplification - I just use that as a starting point because most nutrition labels don't list GI. And even if they did, the number isn't really meaningful except in the context of everything else in your meal, and whatever else is going on in your body that day.