Arduino/raspberry for navi purpose.

Hi guys,
I am not an programmer nor a electronic maniac, I aim for hardware stuff to build, but now I've something more challenging. I need to build a device that after being shoot from air canon and opening parachute will catch gps signal, mark its position and send it via some sort of radio or gsm channels. The best option to do it would be to make it work after receiving G's from gyro. Any ideas what gear involve? The size is important at the end, but I can begin with something bigger.
thanks