There is a GH-6 coming before the year is out, says Panasonic, but they won’t indicate what’s in it, other than that it will be a new Micro Four Thirds sensor with a new processor. Which likely means the Achilles heel autofocus system will not be very different. In the meantime, the company invites you to partake of a slight upgrade from the GH-5 to the GH-5 Mark II, which has a II in the name and a few minor upgrades from the older version all of which you can get if you pay 25 percent more than the price of the Mark I.
The upgrade has a 20.3 megapixel sensor designed in the Obama era, with an improved 6.5 stops of image stabilization. The touchscreen has been upgraded (although it is now smaller), and a livestream feature added. It can now also be powered by a USB C PD port.
Due to the better processor, the recent upgrades to the autofocus system provided to sister products can now be included in the GH-5 series. Which is to say that its autofocus system has improved from terrible to merely poor.