please check this..found a
www.nutritiondata.com a bread that is acually commercial brand. in Mexico its Bimbo wholewheat reduced calories bread, and it has only 3GL (according nutritiondata)..and nutritin info of that bread read on the label, is just 6.165g carbs per slice, so its posibble, even when you take a GI of 100 and try to get its GL, its doable for GLAD...and if every slice is 3GL, you can even eat 2 whole sandwiches =)