For a more in-depth view on the health effects of GM foods, see this longer study by the Institutes of Medicine and the National Research Council.
The European Commission has an excellent overview of all the EU-funded scientific research on GMOs conducted in the 2000s.
Back in 2010, the National Research Council put out a great in-depth study of the environmental benefits and drawbacks of genetically modified food.
Over at Grist, journalist Nathanael Johnson spent months reporting on the science of genetically modified foods, talking to critics and scientists alike. His conclusion is that “the actual hazard associated with the GM foods is somewhere between negligible and non-existent.” But he offered nuanced answers to an array of interesting questions en route to that conclusion.