When trying to eliminate GMO's in your diet, an easy way to start is to make sure you 1) avoid all processed foods; 2) purchase organic or non-GMO; and  3) when purchasing produce if the sticker is a "5" digit code starting with a "9", it is organic, if the sticker is a "4" digit code starting with a "4" it is sprayed with chemicals, but if you are purchasing something with a hard thick outside like watermelon, oranges and cantalopes, then purchasing an item with a sticker starting in 4 is not so bad.  Definitely avoid those "5" digit stickers that start with an "8" as they are definitely GMO.