According to the description in https://docs.thinkwisesoftware.com/docs/sf/screen_types.html#designing-a-screen-type the grid header can be suppressed with the property "Show grid header".
This is highly desirable in order to maximize the number of records displayed on a mobile device. Often the data speaks for itself and grid headers are superfluous.
At the moment this feature is not supported in Universal GUI.
We would like this feature to be supported in Universal GUI.