http://gmopundit.blogspot.com.au/2007/06/150-published-safety-assessments-on-gm.html
Here's a list of six hundred studies about the safety aspect of GMOs. Go on and handwave them as being bought out by Agent Orange.
http://genera.biofortified.org/viewall.php
This provides you with a simpler way to search through lots of the studies on GMOs.
http://www2.ca.uky.edu/entomology/entfacts/ef130.asp
Here's a little bit on BT Corn.
http://www.news.cornell.edu/stories/2011/08/researchers-identify-insect-resistance-bt-pesticide
And here's how the insects are adapting to our pesticides, which causes us to get into a genetic arms race with insects. This spurred the biotech firms to develop strains specifically resistant to pests, so we don't have to use pesticide. Basically we're giving our plants M-16s and training up their own Taliban to throw off the Soviets.
http://www.ers.usda.gov/data-products/organic-prices.aspx
The USDA has come to the conclusion that purchasing solely organic food costs anywhere from $4,000-$10,000 more per household, per year. This is where I got my first conclusion that organic food is irresponsibly wasteful. And you're basically eating it because peasants can't afford it. Or because it gives you the bum tickly feel goods.

So with these huge piles of information, I'm going to give you some Star Talk.
https://soundcloud.com/startalk/cosmic-queries-gmos-with-bill-nye-part-1?in=startalk/sets/podcasts