It looks like you have the Solo powered up - it's not a good idea to have the Solo and hence gimbal powered up without the camera installed.
It will try and balance the gimbal but without the camera it's too much unbalamced weight. It will usually give up and flop to one side like your's seems to have done.
Try powering up with the camera and balance weights (if it's a GP silver) and see how it sits. It should balance level and you shouldn't hear too much work being done by the gimbal motors. It should be fine, but long term powering up like this could contribute to excessive wear.