For the record, 95.129 was revised in September of 2015 to read:
Every station in a GMRS system must use transmitters the FCC has certificated for use in the GMRS. Transmitters that have been certified for use in the GMRS may be found on the FCC Web site at https://apps.fcc.gov/oetcf/eas/reports/GenericSearch.cfm. All station equipment in a GMRS system must comply with the technical rules in part 95.
Copied from eCFR — Code of Federal Regulations
Every station in a GMRS system must use transmitters the FCC has certificated for use in the GMRS. Transmitters that have been certified for use in the GMRS may be found on the FCC Web site at https://apps.fcc.gov/oetcf/eas/reports/GenericSearch.cfm. All station equipment in a GMRS system must comply with the technical rules in part 95.
Copied from eCFR — Code of Federal Regulations