GHM may refer to: Guitar Hero: Metallica, a 2009 music rhythm video game Guitar Hero Mobile series, the Guitar Hero game series Global Harvest Ministries, the Christian mission organisation Guwahati Half Marathon, an annual road running event held on the streets of Guwahati, India Centerville Municipal Airport (Tennessee), the IATA code GHM Gaza Health Ministry, the Palestinian government agency Guangdong–Hong Kong–Macao Greater Bay Area, megalopolis in south China