Do a search to find a thread that had a link to a complete GI chart. It was huge, and freakin awesome. But for high GI carbs, Chewy Spree and Sweet Tarts are the best. They have Dextrose and Maltodextrin, which are some of the highest GI carbs. Malto is 150 on the chart. A lot of people suggest fat-free ice cream as well. For low GI carbs, go for oatmeal, sweet potatoes, things like that. I'm not sure what else. I don't plan every meal out for the carb up. I just make a conscious effort to gradually switch to lower and lower GI carbs until Saturday night.
BTW, I'm on my 3rd week (it's Thursday now) and I went from 184/5 to 178.5. CKD works.