When you are on this program, you'll want to consume GI Food that is low on the scale. This diet is based on the principle that if you eat low level choices more often, you can help to control the blood sugar and insulin release which then causes a corresponding control over your hunger levels.
GI Foods that are high on the scale are going to be rapidly digested by the body and will make you want to eat more of them which then means a higher calorie intake. Since weight loss is determined by your total calorie intake, keeping this under control is of utmost importance.
The following is a GI Food list that categorizes the choices into low, medium and high.
Keep in mind too when making your selections that the more volume you eat of these foods the greater it will increase the effects on your body. So for example, if you have one slice of bread but also eat it with a protein source and a fat source, it will not have the same effect on your body as it would if you had just eaten three slices of plain bread.
Focusing on a balanced intake will likely give you the best results, with most of the carbohydrate containing foods coming from the low or medium category.