I use more than a year both 5DmkII and GH2 for filming.
Colors of 5D are better on my taste and feel in terms of natural, vivid wide range color scheme.
But I get the best and simpliest match of both cameras using "Neutral" 0,0,0,0 on 5D
and "Vivid" on GH2. No cinestyles they can ruin your picture in certain circumstances.