I wish Panasonic would have one like this, for the GH2, as well. It would be lovely, to be able to control it, through an external wire, on your Tablet. Or maybe, they could just add a wireless remote. hmmmm ....
https://play.google.com/store/apps/details?id=jp.co.panasonic.lumix_link.activity&hl=en
https://itunes.apple.com/us/app/panasonic-lumix-link/id456228089?mt=8https://itunes.apple.com/us/app/panasonic-lumix-link/id456228089?mt=8