If you still have some GH5 questions left you will probably find the answers inside this hour-long interview with Sean Robinson from Panasonic. On top is part A of the interview. And here are the links to the other parts: Part B, Part C and Part D.
Preorders (use these links to support my work thanks!):
GH5 at Amazon, BHphoto, Adorama and Panasonic US. In EU at Amazon.de, Cyberport.de and ParkCamera.
Battery Grip for DC-GH5 at Amazon, BHphoto and Adorama.
Leica 12-60mm at Amazon, BHphoto and Adorama.
12-35mm F/2.8 II Asph at Amazon, BHphoto and Adorama.
35-100mm f/2.8 II ASPH at Amazon, BHphoto and Adorama.
45-200mm f/4-5.6 II POWER OIS at Amazon, BHphoto and Adorama.
100-300mm f/4.0-5.6 II POWER OIS at Amazon, BHphoto and Adorama.
Panasonic DMW-XLR1 XLR Microphone Adapter at Amazon, BHphoto and Adorama.
DMW-DCC15A DC Coupler at BHphoto and Adorama.