This event is the second instance of the contest for graph transformation-based tools, which was first held as part of the AGTIVE workshop. The aim is to stimulate tool development by providing a sense of competitiveness, as well as the chance to get to know and learn from the features of other, related tools. 1 Aims of the Workshop Tools are crucial for the promotion of graph transformation in industry. It is only with the ready availability of reliable, easy-to-use tools that the attractions and benefits of graph transformation can ever become clear to anyone not having a prior education in this field. Furthermore, given the inherent complexities of the method, tool performance is an important issue. As a community we should be constantly working to improve tool support in all these aspects. A variety of tool environments exists, supporting different graph transformation approaches and to some degree serving different purposes. There are some examples of tool comparisons, e.g., ...