There's an important relationship between many GMOs and glyphosate. Whether or not GMOs are dangerous in and of themselves, they are dangerous because of this relationship.
To elaborate:
"Roundup Ready crops are crops genetically modified to be resistant to the herbicide Roundup. Roundup is the brand-name of a herbicide produced by Monsanto. Its active ingredient glyphosate was patented in the 1970s. Roundup is widely used by both people in their backyards and farmers in their fields. Roundup Ready plants are resistant to Roundup, so farmers that plant these seeds must use Roundup to keep other weeds from growing in their fields."
Source:
http://web.mit.edu/demoscience/Monsanto/about.htmlThis means that GMO foods, especially soy and the like, are MUCH more likely to contain glyphosate---the whole purpose of them being GMO is to allow them to use glyphosate to kill weeds, without harmimg the GMO plant.