Found this on an anti-gmo site somewhere and hope it helps:
More than 50 percent of papaya from Hawaii is genetically modified to resist a virus. Most U.S. papayas come from Brazil, Mexico, or the Caribbean, however, where there are no GM varieties. According to GEO-PIE, your chances of encountering a GM papaya "are highest in Hawaii or the continental west coast." Some zucchini and yellow crookneck squash are also GM but they are not popular with farmers.