Marc, I am going to get an FM CB sometime in the next year or two, but haven't decided how or where to mount it in my Jeep. Pretty sure we are only an hour or so apart (depending on traffic). We can probably both hit some of the same repeaters that are between us. I actually haven't tried them in a while
A 90-341 type relay is a 2 pole double throw relay with a 120v coil with each contact rated for 15 amps. If you use both poles you are 15x2 amps.
It is the second most common relay in HVAC/R work ... the most common being the 90-340, same relay with 24v coil
Emergency comms is not the focus of GMRS, nor is GMRS particularly useful for E comm; that is why it is little used as such.
GMRS is good for what it is good for.
In my experience those with use more than 10% of the time are usually used by people who won't let you get a word in edgewise and/or you don't want to listen to anyway.