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The Giant Gemini GMOS survey (GGG survey or GGG) was a spectrographic survey of a selection of 163 quasars with z above 4.4, carried out using the GMOS multi-object spectrograph on the Gemini Observatory telescopes. A goal was the accumulation of Lyman-alpha forest data to provide information about galaxies along the lines of sight. Observations were carried out in 2010-2011.