The Glycemic Index gives a rating to each food, between zero and one hundred. Did you know, the yellow split pea(channa dal) used in most of our Indian cooking has the rock-bottom lowest GI of any food.
High: 70-100. These foods raise blood sugar levels rapidly. Keep to a minimum when trying to control weight. Quickly absorbed sugar requires the body to release large amounts of insulin, which promotes fat storage. The lower the insulin, the less likely fat storage.
Medium: 55-70. Include in moderation.
Low: Below 55. To achieve weight loss, base meals and snacks around these foods.
High GI :
- Baked Potato, 85
- Bagel, 72
- White Bread, 70
- Morning coffee, 79
Medium GI:
- Croissant, 67
- Sugar, 65
- Sweet Biscuits, 69
- Basmati Rice, 58
- Honey, 58
- Popcorn, 55
Low GI:
- Noodles, 47
- Pasta, 41
- Baked beans, 48
- Kidney beans, 27
- Lentils, 29
- Chick peas, 33
- Apples, 36
- Bananas, 55
- Kiwi fruit, 52
- Milk, 27
- Lentil Soup, 44
- Yogurt, 44
Here is a list of GI for some of our Indian food:
Bengal gram dal (chana dal), 16
Rajmah (red kidney beans), 27
Baisen (chick pea flour), chapati 39
Green gram (mung beans), 54
Barley chapati, 61
Black gram, 61
Horse gram 73
Whole greengram 81
Bajra (millet), 82
Maize chapati, 89
Semolina, 94
Tapioca, steamed 1 hr, 100
Jowar, 110
Ragi (or Raggi), 123
I found a few sites which have detailed lists for all the foods available in this world. 
If you want to find out more, take a look at the following links:
P.S:I hope you have found this information to be of use & value. Use at your own risk if u want to loose weight in the coming year. 
Posted by RH on February 10, 2008 at 11:28 am
Great Post, esp for people like me, with borderline type 2 diabetes . Its such a coincidence how I wrote almost the same things about channa dal in my post, before reading it here today.
Posted by JD Reilly on April 13, 2008 at 7:13 pm
The effect of the glycemic index on the body is that it allows people to know which carbohydrates are the ones that can cause the most damage and those that break down easily in the system. The effect of the glycemic index on the body is crucial to anyone who wants to monitor their blood glucose level.
Posted by Vengrai Parthasarathy on December 31, 2009 at 5:38 pm
This is most useful ..special diet for diabetics maybe considered.
Vengrai
Posted by karthik balram rao on January 1, 2010 at 3:18 am
excellent information that is very useful for people like me who are trying to reduce some weight.
Posted by chris healy on April 26, 2011 at 4:21 am
Great info especially for a vegetarian on a low GI diet like myself. However one of your data is incorrect/misleading. The “morning coffee” you quote at a GI of 79 is, I believe, the name of a brand of biscuit [ref Sydney Uni GI site]. The implication in your list is that a cup of coffee in the morning has high GI. The reverse is in fact probably the case. If the coffee is black there is effectively no carbohydrate load so it has a GL of 0 and would be not relevant in terms of GI. If the coffee has milk then that would in fact render it a very low GI product. Kind regards Chris Healy
Posted by Murthy Kovur on October 27, 2011 at 6:28 am
Very useful info
Posted by Malathi on November 6, 2011 at 6:59 am
I thought Ragi was a health food for diabetics , but your list show it as a high GI food.
Is there an error in the info or am I mistaken ?
KNM
Posted by Shyam Sarda on March 20, 2012 at 9:19 pm
The mung beans has shown higher index number. Are these numbers reliable? The black coffee has also high index number.
GDS
Posted by Murthy Kovur on March 22, 2012 at 7:29 pm
Glad
Posted by Rekha on June 20, 2012 at 3:36 am
This is very good infermation for a diabitec person but is incomplete without GL of food.
RSS
Posted by Sunanda on July 14, 2012 at 12:47 pm
really good info, thank u so much.
Posted by Vijay Tyagi on September 19, 2012 at 3:45 am
Thanks!for healthy information.