GCD may refer to: Greatest common divisor Binary GCD algorithm Polynomial greatest common divisor Lehmer's GCD algorithm Great-circle distance GCD, Chinese Internet slang for the Chinese Communist Party () General content descriptor, a wireless device file format Geneva Consensus Declaration, a non-binding anti-abortion statement signed by a handful of nations Global Cities Dialogue, an international development organisation Grand Central Dispatch, a parallel computing framework Grand Comics Database Grant County Regional Airport, near John Day, Oregon, United States Griffith College Dublin, in Dublin, Ireland Yukulta language, spoken in Australia Graphics Compute Die