RCD
GGM stands for:
- Gabelsberger Gymnasium Mainburg
- Gdańska Galeria Miejska (Gdańsk City Gallery)
- Geographi Graeci Minores , compilation of ancient Greek geographers
- Munzenberg Geological Garden
- Gmeinder , German gear and railway manufacturer
- Grindelwald – Männlichen cable car , Switzerland
- Gordon growth model , financial model for calculating the value of an investment
- Grotefend-Gymnasium Münden
- Kakamega Airport (IATA code), Kakamega airfield , Kenya
ggm stands for:
- Gugu Mini (formerly ISO-639-3 code), one of the Pama Nyunga languages
