It is ridiculous to even care about any individual food's glycemic index for weight control/dieting. The GI is very misleading. For example, carrots have a very high glycemic index, however, they are so low in calories that you would have to eat an entire bushel of them to spike your blood sugar reading. The glycemic index was developed as a research tool, not a dietary tool.
You normally eat a variety of foods together during a meal, and proteins, fats, and especially fiber, will slow down the absorption of the sugars in the carbohydrates you consume. You very seldom sit down and eat enough of any one item to have to worry about it's glycemic index. Except for ice cream, of course!