Not overly comfortable replying to a necro-post but here goes...
Sorry but your radio is only
certified for VHF use, 138-174 MHz. Not sure why you are thinking it's UHF but even with the frequency ranges you specified, it does not cover FRS/GMRS anyway.
Also, without the KCT-1 programming key to allow field programming of frequencies, CTCSS, etc. you're pretty much screwed with that radio...it's really old and was meant for professional 2-way applications such as fire, police, etc. There are other, better radios out there...
'Fly