Your RF is getting out. Finally.
A GMRS license grants you access to 30 channels in the 462/467 MHz UHF band, the ability to use repeaters, and the freedom to choose your own antennas and power levels within FCC limits. Here's what your license actually authorizes and what obligations come with it.
Your license covers all 30 GMRS channels: 16 main simplex channels (1-22, with channels 8-14 being interstitial low-power channels), 8 repeater output channels (15R-22R), and their corresponding input frequencies. Channels 1-7 and 15-22 allow up to 50W. Channels 8-14 are limited to 0.5W. The 8 repeater channels (15R-22R) allow up to 50W.
Unlike FRS, GMRS licensees can use external and detachable antennas. You can install a high-gain antenna on your roof, run a mobile antenna on your vehicle, or use any compatible UHF antenna. This freedom is one of the biggest practical advantages over FRS and is a major reason GMRS achieves significantly better range.
No encryption. The FCC prohibits encrypted transmissions on GMRS. All communications must be in the clear. Scrambler features on your radio should not be used on GMRS frequencies.
You also cannot use GMRS for commercial purposes. The service is intended for personal, family, and non-commercial use only. Broadcasting (one-way transmissions to a general audience) is not permitted.
A GMRS license costs $35 and is valid for 10 years. You can renew within 90 days before expiration through the FCC's ULS system. If you miss the renewal window, you'll need to apply for a new license and may receive a different callsign.
One of GMRS's most appealing features is that a single license covers your immediate family members. Your spouse, children, parents, and siblings can all operate under your callsign at no additional cost. See Who Can Use Your License for full details on who qualifies.