I owned the G6 last week.
The peaking works pretty well and the back screen is really wonderfull.
BUT ! Unfortunately, the codec is not good enough compared to the GH3.
The picture is noisy even at low iso like 160... (with the mp4 ANd avchd modes)
The amount of definition disapointed me.
It's a shame because I think the G6 could be a dslr killer with a good hack.
I finally owned a GH3 with cleaner and much sharper video.
The evf is really good but I decided to buy an extternal monitor for landscape shootings outdoor in bright light.
The G6 is a good camera but suffers by the lack of a good codec. :-/