It's not possible i'm afraid. The only way i could think of to try and do that would involve putting something metallic (tin foil for example) over the GPS part of the camera but it wouldn't look pretty! Can i ask why you would like to disable it?
All electrical and electronic circuits "transmit" by the very nature of how electricity works.
There are a number of good reasons for wanting to turn GPS off, but all that should matter to a manufacturer is that people want this and if you do not give it to them they may decide to buy from someone else who does.
I know they all transmit, but most are at such an extremely low level they don't produce enough RF to cause interference. I was just curious if these did. If I remember right, there is some regulation that states how much RF a device can produce to keep them from causing interference to other devices.
Yeah, turning off a GPS ought be an option made available for those that don't want or need it. As far as I know, mine shuts down during parking mode to save on power consumption. But I keep mine active for the speed indicator.