it does help, which is why someone with diabetes would be recommended to follow a low GI diet.
I am incorporate low GI into my free food choices. So I no longer have any of the "white" carbs, which are not healthy for you in any form.
Is worth bearing in mind when buying whole wheat bread, as although it may say wholewheat on the front of the packet, it isnt always necessarily so. As the main ingredient is usually white flour.
My cupboard is stocked up with wholewheat pastas, and wholewheat rices etc
Some veg can be the same. Sweetcorn for instance has a High GI.
If you are interested I would recommend reading Rick Gallop's low GI book as it explains how our body processes certain foods. Low GI will keep you fuller for longer and help you avoid those naughty cravings.