I'll second that. The FCC sets specific station identification requirements for GMRS. However, identifying a station and calling a station are not the same thing. At the minimum, a family member can key the mic, simply state their call sign and then call another family member by name, nick-name, or whatever (WABC1234, hey sis, you out there?). The other family member can then key their mic, state their call sign and start talking (WABC12343, yup, wassup?). Then, at least once every 15 minutes, each person must simply state their call sign. Note that all you need to say is literally just the call sign. You don't need to say "This is WABC1234." Should you happen to be monitoring a ham station, note that while the rules are pretty much the same for ham radio (with a 10 minute interval between IDs) the common practice is to call people by their call sign rather than name. But, as is the case in GMRS, this is not required.