I prefer to look at glycemic load, but they both come in handy.
Some various charts for reference…
GLYCEMIC INDEX & LOAD
By Food Type From Harvard Medical School
International Table of Glycemic Index & Load Values 2002 (very detailed) Special report from Amer Jour Clin Nutrition
Revised International Table of GI & L values 2008 (detailed) From Mendosa.com
This is next one is of my favorites- a matrix that shows you some examples of how to look at index and load in relation to one another…
GI/GL Matrix From Amer Jour Clin Nutrition via Health Mango
Alphabetical (Extensive) From GlycemicIndex.ca
By Food Type From DiabetesNet.com
By Food Type (with Packaged Foods Included) From Glycemic Edge
From High to Low From The Food Farce
The important thing is to use all this info in conjunction with how different foods make you feel. No matter what a particular chart or index might say, the ultimate determinant of a food is how it affects and/or impacts you.