Really? I'm with Orangenz on this one, the GH4 was dramatically noisier than this. 3200 here is what 800 looked like on the GH4, maybe a little bit cleaner even.
Have we been conditioned to be afraid of any and all noise? Go back and look at any cinema older than 20 or so and you'll see grain everywhere. Super pristine images are a relatively recent development. Yes, technology moves forward and standards change, but I'd say that the level of noise we see at 3200 on GH5 wouldn't even be noticed by audiences on Youtube, or at regular viewing distances from a television.