For those of us outside of the US, what is FRS & GMRS

As for me, I use UHF Handhend CB's as my primary radio to grab.
I have 2 high quality handhends which transmit on 1w/5w with extra antanne and conections etc. and I have some cheap handhelds for local comms.
I have a couple of 27Mhz CB radios as well if I need extra distance, but they aren't as common around here now.
I also have access to some Ham gear at friends if I need it, but I am not licenced.