Group Monitor is a digital feature. The radio embeds GPS data on your signal when you transmit using a digital mode and so any other Yaesu digital radios will know your position. It's similar to APRS but doesn't require a second channel & frequency. So the secondary side of the radio is still available for analog or regular APRS if you wish.
Never got a camera mic. That sucker ain't cheap and seemed a little silly. I dunno, maybe it would be useful.
'91 Toyota Pickup
'09 Kawasaki KLR650
'12 Gunnar Rockhound 29
"They say the test of literary power is whether a man can write an inscription. I say, 'Can he name a kitten?'" -- Samuel Butler