Regulations of the FCC specifically authorize that. In a pertinent part: 47 CFR
§ 95.1731 Permissible GMRS uses…
(b) One-way communications. The operator of a GMRS station may use that station to transmit one-way communications:
(1) To call for help or transmit other emergency communications;
(2) To provide warnings of hazardous road conditions to travelers; or,
(3) To make brief test transmissions.
(c) Travelers assistance. The operator of a GMRS station may transmit communications necessary to assist a traveler to reach a destination or to receive necessary services.