Under the most favorable of circumstances, accidental drift would cross pollinate a very minor fraction of the seed in an adjacent field. Even assuming that Monsanto had raised a test plot of glyphosate resistant wheat in this very same field, and that wheat had been grown continuously on the field in all intervening years, after 8 years of 10% cross pollination, only .000001% of the current wheat would carry the GMO trait.
Yep. I smell a set up.