Video CAM Tracker

Hi all
We have a high end camera platform with manual and video tracking capabilities. Now we would like to feed into the system the drone-position via telemetry to follow the drone if we can not yet track it. What I have at the moment working is a Raspberry Pi running Mavproxy were I can connect Missionplanner over TCP via LAN or WLAN.
What I am looking for is some help how to extract the Lat, Lon, v-horizontal, v-vertical from GLOBAL_POSITION_INT into a UDP stream in ASCII.
Many thanks for any help

nobody able to give me a hint how to go forward with this project?
Help very much appreciated

MP option Antenna Tracker, being informed of its coordinates, informs directly with servo pulses.

Here it is used with a Pololu Maestro: