| Abbreviation | Definition |
|---|---|
| GPD | Greensboro Police Department |
| GPD | Guam Police Department |
| GPD | Guam's police department |
| GPPD | Galena Park Police Department |
| GPPD | Grand Prairie Police Department |
| GPPT | German Police Project Team |
| GPR | Guilty Plea Rate |
| GPS | Good Police Surveillance |
| GQ | Gun Quality |
| GRASP | Gang Rescue And Support Project |
| GRC | Gendarmerie Royale du Canada (RCMP) |
| GRP | Government Railway Police |
| GRPD | Grand Rapids Police Department |
| GRPF | Galactic Republic Police Force |
| GRPF | Government Railway Police Force |
| GSE | Global Security Environment |
| GSM | General Street Madness |
| GSM | Government Surveillance Monitoring |
| GSPD | Gulf Shores Police Department |
| GSPS | Greater Sudbury Police Service |