The glycemic index of raw Grapefruit?

Question

How Can I Tell What the glycemic index of raw Grapefruit? Is it regarded as as low glycemic index food or high glycemic index food?

Answer 1

The glycemic index (GI) of raw Grapefruit is 25. It's considered as low in the glycemic index.
low GI = 55 or less.
 Medium GI = 56–69.
 High GI = 70 and above.
source of data > http://riskfactor.cancer.gov/DHQ/database/gi_values.csfii_94-96_foodcodes.csv