The FDA has no process for testing the safety and nutritional content of GE food. It relies on data from the companies themselves.
GE crops have abnormalities in amino acids, vitamins and fatty acids (more: 1, 2, 3, 4, and 5). But the FDA is signing off on them anyway. The FDA doesn’t approve or reject any of these applications—the agency merely “comments” on them, and they move forward.