gopro gimbal

I’m a new 3dr owner, any solution for a gimbal not even lighting up on drone does it need to have a GoPro plugged into it for it to start up?

Knowing now that everyone on this forum has at LEAST 6 spare gimbals packed away in their closet, is there a way to make a DIY handheld gimbal to use with the goPro? at $40 for the solo gimbal, I feel like a lot of bang for your buck could be had with the Karma Grip running at $299 I know that...