Hello
Which version of the Witmotion did you use ? There is a lot of version available in store.
This is the raw gyroscope data. Gyroscope give a angular velocity in rad/s. So you have to make an integral of this value to obtain an angular position. And you don’t have the benefic of filtering the gyroscope value by the accelerometer data throught kalman filter (which makes the BNO085 in game rotation vector mode).
Here is a good document (in french) who explain the advantage/drawback of each sensor used alone and the benefic to combine them : http://starlino.com/wp-content/uploads/data/imu_guide/GUIDE_D_UTILISATION_D_UN_MODULE_DE_STABILISATION_INTEGRE.pdf
Math