Greetings. I have the GoPro and love it. It does have noise with the open window installed. I have used it mounted to my rollbar but have thought mounting it with the provided suction cup on the dashboard would help tremendously with the wind noise.
Note: the sqeaking noise is the rollbar hitting the rubber grommet.
This video was taken during some spirited running at above posted limits.
YouTube - ‪Cobra in Maryland‬‏