Twitter is one of the most popular social networking and microblogging services in the internet world. By the end of Jan 24, 2017, there were at least 100 million active users daily around the world. Due to such a huge number of people, it is a great channel to collect information about almost anything existing in the world. Based on this information, we could also analyze the popular topics which are widely discussed. For the work of my paper, the target is to find out the perception about GMOs, but also focused on the difference in perceptions between Europe and the United States. To accomplish this work, a collection of Twitter was collected that all include the text about GMOs, along with their locations. Analytics were performed on the tweets to classify them by sentiment, then statistical tests were carried out to assess differences in perceptions by location.