This is a little like comparing apples and oranges. In Canada, no license is required for GMRS but then it is supposed to be limited to 2 watts and no repeaters. I suspect there is a little cost and some setting up of repeaters [to avoid undo interference to GMRS and other out of band users], thus some knowledge of radio systems is necessary. I'm not sure if licensing is used to avoid too many repeaters in a specific area or not. Won't go into why license is necessary as I stated above no repeaters/license in Canada. Could do search on GMRS to find out, but the poster could do that. With sunspot cycle 24 starting up, CB will be limited [during the day] for close comms., but long distance will be possible. CB 11 meters can be line of site when sunspot cycle low, but with active sunspots, DX is possible.