Macbook pro mid-2010 randomly cuts off. Panic report
Yes the GPU panics are almost certainly due to a defective discrete GPU card. I have the same 2010 MBP and have noticed 10.9.3 has increased the frequency of these fatal crashes significantly.

I'm using the https://gfx.io utility to turn off this discrete card whenever possible but many apps force it on.

P.S. Here is the link from the replacement program, but it had ended: https://support.apple.com/en-us/HT203554