Jaeme, Thanks for the links. The link showing zero GI’s for nuts is, well, nuts. I see no reference for where they got their information and the zero GI values make no sense, given that many of the nuts mentioned have carbohydrate contents similar to peanuts and cashews which do have GI values based on actual testing.
The Vital Health Zone link actually lists GI values for a number of other nuts, but does not cite the source references. I wrote to the site administrators requesting this information and will post their response here when I receive it.
In the meantime, for other tree nuts, I would just assume a GI value of 22 from the one tree nut that has been tested, cashews.