GMRS (General Mobile Radio Service) is a licensed radio service.
GMRS consists of 16 UHF channels on FM, plus 7 channels that are shared with FRS.
The maximum allowable power for a GMRS radio is 50 watts. The GMRS channels which are shared with FRS are limited to 5 watts of power.
The use of repeaters is allowed on GMRS. Most GMRS repeaters use CTCS (Control Tone Coded Squelch).
The frequencies assigned solely to GMRS are:
| Designator | Simplex or Repeater Output | Repeater Input |
|---|---|---|
| 550 | 462.550 MHz | 467.550 MHz |
| 575 | 462.575 MHz | 467.575 MHz |
| 600 | 462.600 MHz | 467.600 MHz |
| 625 | 462.625 MHz | 467.625 MHz |
| 650 | 462.650 MHz | 467.650 MHz |
| 675 | 462.675 MHz | 467.675 MHz |
| 700 | 462.700 MHz | 467.700 MHz |
| 725 | 462.725 MHz | 467.725 MHz |
The frequencies which GMRS shares with FRS are:
| Designator | Frequency | FRS Channel |
|---|---|---|
| 5625 | 462.5625 MHz | 1 |
| 5875 | 462.5875 MHz | 2 |
| 6125 | 462.6125 MHz | 3 |
| 6375 | 462.6375 MHz | 4 |
| 6625 | 462.6625 MHz | 5 |
| 6875 | 462.6875 MHz | 6 |
| 7125 | 462.7125 MHz | 7 |
462.675 is the unofficial GMRS channel for emergencies and assistance.