The guys over at sph engineering, who are known for their ugs software (ground controlling app that can control just about any drone/autopilot) have been working on a universal adapter for DJI gimbals so you can use DJI gimbals with any autopilot which is quite interesting. Only problem is that it is rather big and bulky for now. Also no idea about pricing yet either.
The device features an Ethernet interface and can be operated through a web browser. Video stream can be played with media players such as VLC and others as ffmpeg. Furthermore, REST API is also available for controlling the camera.