Hi Nelleraye
I've been researching the same thing over the last week - my tiny and short 5 year old dd has been recommended a low GI to help her produce more growth hormone.
From what I have read, seems that the less processed something is, the lower the GI. So I'm going for wholemeal breads with more grains instead of white bread - that sort of thing. Just started cooking a banana bread recipe with all wholemeal flour instead of white.
There seems to be a common thread in books and internet sites that "whole foods" are lower GI, and limit potato. Also beans, peas and lentils seem to be very good, so I'm looking for recipes that DD will like.
So I am trying to use my DD's favourite foods, but making them low GI friendly. And better quality sweet sources that won't spike her eg no white sugar.
Hope that helps. Low GI is still very new to me, so if you have any further info to share, I'd be very grateful.