I have a bunch of test footage from a photo shoot I was covering a few months back and I just wanted to show the grading capabilities of the GH2. I've colored footage from many different sources (dslrs, xdcam, avc intra, red, alexa, etc) and, granted you've shot it flat & transcoded with 5DtoRGB, you can get some pretty good results from the GH2. You don't nearly get as much latitude from it as red/alexa stuff, but you'll have enough room to play around with different looks.
This isn't the best grade, it's merely just one look. I was thinking about making some color grading tutorials, let me know if you're interested!