The Non GMO stamp is a solution to this and I would start up one for Holidays and atrazine free labels also.  It's not governmental but a non profit 3rd party. Companies sign up and get tested and then randomly tested for compliance. This label is more important when I shop than USDA organic. We do not know but we can do our best.  Ideally signing up for a local Sustainable Agriculture CSA or farm box is better.  More and more of those becoming available. Whole Foods bas betrayed customers over the years in many ways. Their non organic "natural" store brand products were found to be full of GMOs and they wete instrumental (and paid a lot of money) in fighting GMO labeling legislation. That said I do shop there when I cannot get to the local coop i belong to which is 45 min drive downtown.  Or cannot wait for orders placed through Azure Standard.  Haven't had the cash flow to manage either lately and had to rely on local store growing organic sections.