The Excellence in GSI Awards Ceremony (May 23) is the region’s only award that celebrates and elevates green stormwater infrastructure projects and innovations, the triple bottom line (TBL) benefits of a nature-based approach to stormwater management, and the partners who bring these projects to life in the Greater Philadelphia Area. Buy tickets. The GILL team is honored to be considered as a finalist and is looking forward to the 2019 Excellence in GSI Awards Ceremony on Thursday, May 23rd.