The structure is expected to be delivered to Chile at the end of 2025. As of August 2022, construction of a 40,000 square foot facility at Ingersoll Machine Tools in Rockford, Illinois to build the telescope structure is complete, with the construction of the telescope structure in anticipation. Wavefront control and adaptive optics (AO) The primary mirrors are housed inside a "cell" which protect the mirrors. Pneumatic actuators will push on the back of the primary mirrors to correct for the effects of gravity and temperature variations on the mirrors. The GMT's Adaptive Optics system will be built into the secondary mirrors which will be deformable. The Adaptive Secondary Mirrors (or ASMs) consist of a thin sheet of glass that is bonded to more than 7000 independently controlled voice coil actuators. These actuators will be able to push and pull on the mirrors over 1000 times a second to correct for wavefront distortions introduced by turbulence in the Earth's atmosphere. The GMT will have several types of adaptive optics. The Ground layer AO allows corrections over a large field of view (≥ 10 arcmin). The Natural Guide Star AO is needed to produce diffraction-limited corrections over a small field of view (20-30 arcseconds). The Laser Tomography AO uses six laser guide stars and a faint, natural guide star to extend diffraction-limited corrections to regions without a bright guide star. The performance will be similar to Natural Guide Star AO, but with reduced contrast. Science instruments The planned first light instruments are four instruments and one facility fiber positioning system. The fiber positioning system is necessary because of the wide field of view of the GMT. Using this system it is possible to observe multiple targets over the entire field with one or more of the spectrographs. GMT-Consortium Large Earth Finder (G-CLEF) - an optical band echelle spectrograph GMT Multi-object Astronomical and Cosmological Spectrograph (GMACS) - a visible multi-object spectrograph GMT Integral-Field Spectrograph (GMTIFS) - a near-IR IFU and AO imager GMT Near-IR spectrograph (GMTNIRS) - a near-IR spectrograph The Many Instrument Fiber System (MANIFEST) - a facility fiber system Additionally the Commissioning Camera (ComCam) will be used to validate the Ground Layer Adaptive Optics performance of the GMT facility Adaptive Optics System. Comparison The Giant Magellan Telescope is one of a new class of telescopes called extremely large telescopes with each design being much larger than previous telescopes. Other planned