suny99 Gstreamer act as streaming server. It send video pipleine from your RPI & camera ( thru LTE connection ) to Android using UDP protocol ( supported by gstreamer ). Ground control software has build in decoder + UDP support and can decode this pipeline itself.
To decode gstreamer pipeline on ground control side you have to setup following line in UDP settings field:
udpsrc port=5600 ! application/x-rtp, payload=96 ! rtpjitterbuffer ! rtph264depay ! avdec_h264 ! fpsdisplaysink sync=false text-overlay=false