CGL may refer to: Cambridge Greek Lexicon Carrier Grade Linux Catalyst Game Labs Core OpenGL: Apple Computer's Macintosh Quartz windowing system interface to the Mac OS X implementation of the OpenGL specification Conway's Game of Life Chengalpattu Junction railway station (station code), in Tamil Nadu, India Chronic granulocytic leukemia, also known as Chronic myelogenous leukemia Confederazione Generale del Lavoro Commercial General Liability, a common type of liability insurance CGL (charity)