Labelling non GMO foods

Are GMO foods as good as they are trying very hard to convince you. If GMO foods are really as good as they say, they will be rushing to label their foods, but they are not. This tells you that GMO foods are not as good as they say they are. Non GMO food has become a brand name, it is time they label their food as non GMO. Why are some farmers forced to used GMO seeds? If these GMO seeds are as good as they say, they do not need to force farmers to use GMO seeds