GCJ

AcronymDefinition
GCJGary Clark, Jr. (musician)
GCJGoogle Code Jam
GCJGreen Cross Japan (pharmaceutical company)
GCJGrand Central, Johannesburg (Johannesburg, South Africa)
GCJGNU (Gnu's Not Unix) Compiler for Java Programming Language (trademark of Free Software Foundation, Inc.)
GCJGlobal Commission Junction (online business)