In practice, GMO agriculture creates a trade imbalance. Instead of simply exporting produce, many countries will find themselves importing huge volumes of proprietary products from the likes of Monsanto. This includes buying new breed of patented seeds every year, fertilizers, insecticides, pesticides, etc. And of course, once a farm goes GMO, soil damage makes it almost impossible to go back to organic farming. High level of lock in.
http://sustainablepulse.com/2015/10/22/gm-crops-now-banned-i...
GMO seeds have been modified to create plants that won't make new seeds, great for recurring revenue