I've got my hands on the GF2 for several days. After getting into multirotor world, I'm evaluating every camera if they're suitable with copters or not
For weight wise, it's a perfect candidate.
For photo shooting, again it's a perfect candidate.
For video shooting, as Jeff stated, it's lack of manual control.
I've selected Sony NEX 5 for this type of work. But I'm pretty sure you'll be so happy with GF2.