I was under the impression that the usual FRS/GMRS radios are not repeater capable?
As in, I set up a repeater, and buy a repeater-capable handheld, I can't use the repeater to talk to the usual FRS/GMRS (e.g. Midland GXT1000) handhelds my neighbors have. I could I suppose, talk directly to them w/o going through the repeater, but that makes the repeater not very useful.
(I was all hot to install a GMRS repeater - I have the mountaintop for it - but it's kind of a non-starter if the neighbor's GMRS radios from Cabelas don't work)