The 25-meter Giant Magellan Telescope (GMT) is one of the next generation of extremely large ground-based
optical/infrared telescopes. GMT is currently under development by a consortium of major US and international
university and research institutions. The telescope will be located at the Las Campanas Observatory in Chile. The GMT
Project is mid-way through its Design Development Phase. This paper summarizes the organizational structure and
status of the GMT Project and recent progress in the technical development of the various GMT subsystems.