The other day while working with @BluSkyFilms helping with a Real Estate Video, I watched as he tested out the new CAME-TV Prophet Gimbal. One thing I noticed was how many times he let go of the gimbal handle every time he needed to Start and Stop video. This could literally be hundreds of times in a full day shoot. Because most people don't want to deal with wires on a stabilizer, here's an inexpensive Wireless Panasonic Remote I think could really save a lot of time and improve efficiency on the job. It's about $25 dollars and I can verify that it does work with cameras like the Panasonic GH4 / GH5.
You can mount it to the handle of your gimbal allowing for for easy Start/Stop video controls. What i've done is to add a strip of industrial double sided tape to the front, and lay a velcro strap over the top. This will let you mount it to just about any type of handle, and it's not permanent. Available on Amazon (here).