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 Pickup - Imelda
'08 Tacoma TRD - Donna
"Hey Macarena!" -- Thomas Jefferson