The EU and the US launched negotiations on a Transatlantic Trade and Investment Partnership (TTIP) in July 2013. Among the TTIP aims, there are negotiable terms under which the EU would import more genetically modified (GM) products and change its labeling regulations on GM Organisms (GMOs). This paper discusses a trade agreement of agricultural products between two countries, with different GM regulatory regimes from a political economy perspective. We find the negotiation equilibrium of the GMO Trade Agreement and compare it with a stricter trade policy. We find that if the trade agreement leads to a lenient GM regulation, lobbying intensifies. However, this effect is moderated if there are exports of non-GM products.