That's extremely low; a banana contains far more, an apple contains about 10 grams of sugar, 100 grams of green grapes contains 16 grams. (supernaturalacnetreatment.com)
You can use green grapes in this recipe if you wish; buy organic whichever variety you choose since they're high in pesticides in conventional form. (heathermcclees.com)
The best choice between red or green grapes = red grapes! (jaylabpro.com)