India can attain a higher GDP growth of 7-8% to become third largest economy after US and China by 2020, if reforms are pursued more aggressively, according to Deutsche Bank chief economist Norbert Walter. "The continuation of the reform process will allow India to stay on a high growth path of around 6% annually over the next 10-15 years. If reforms were pursued more aggressively, the real GDP growth could reach 7-8%,' Mr Walter said at seminar in Indo-German Chamber of Commerce (IGCC).