GMO Food Allergies & Gluten Sensitivity - Jeffrey Smith

Here's another great article, mentioning the correlation between Bt toxin and leaky gut.
http://nourishingplot.com/2014/02/11/foods-act-as-pesticides-within-leaky-gut-patients/

Here's a list of "approved" genetically modified plants:
http://www.isaaa.org/gmapprovaldatabase/cropslist/default.asp