You can avoid purchasing GMO papayas by buying the certified organic variety. You should also avoid papayas from Hawaii because of the possibility of cross-contamination, and instead purchase ones from Asia, Brazil, Belize, or Mexico. Varieties of non-GMO papayas include Kapoho, Mexican Red, Caribbean Red, Maradol, Royal Star, Singapore Pink, and Higgins papayas. Common GMO papayas are Rainbow, Sun Up, Strawberry, and Sunrise papayas.