GCJ
| Acronym | Definition |
|---|---|
| GCJ | Gary Clark, Jr. (musician) |
| GCJ | Google Code Jam |
| GCJ | Green Cross Japan (pharmaceutical company) |
| GCJ | Grand Central, Johannesburg (Johannesburg, South Africa) |
| GCJ | GNU (Gnu's Not Unix) Compiler for Java Programming Language (trademark of Free Software Foundation, Inc.) |
| GCJ | Global Commission Junction (online business) |