In mathematics, GCD is short for greatest common divisor.


In navigation, GCD is the great circle distance.


Griffith College Dublin is known as GCD for short.


GCD is also the Grand Comic Book Database, at http://www.comics.org.


The Global Clan Directory (GCD), at http://www.globalclandirectory.com/) is a website listing gaming clans organized around multi-player video games.


Global Communications Devices (GCD) is a fabless supplier of highly integrated semiconductor devices used in wireless networking, http://www.gcdchips.com.


Gardner Carton & Douglas (GCD) is a law firm with offices in Chicago and Washington DC, http://www.gcd.com.