The device you noted does not have any video output or input so such interfacing is not possible.
Can I get anywhere an AV cable to join a Garmin Satnav Nuvi200 with a 7" Monitor?
I installed in my car the Rear View Camera & Monitor below, which say can be interfaced as well with DVD/DVR & GPS.
The vendor send me to Garmin & in turn they send me to Maplin or RS components but no luck.
Am writing in the off chance that a magician somewhere might help me. ...thanx ......nick