public bool HasGridOptions( 
   Map map
)

{
    QueuedTask.Run(() =>
    {
        //Does the 'map' currently have any options?
        var hasOptions = GridOptionsEnvironment.Instance.HasGridOptions(map);

        //If grid options have not been set for the map, then default grid options are added
        //for the map otherwise the existing gridoptions are returned.
        //NOTE: Grid options are returned by value meaning a copy is always returned. Any changes made to the
        //grid options need to be -set- back on the map using SetGridOptions for the changes to persist.
        var gridOptions = GridOptionsEnvironment.Instance.GetGridOptions(
                                   MapView.Active.Map);

        //Only return grid options if grid options have previously been set:
        var gridOptions2 = GridOptionsEnvironment.Instance.GetGridOptions(
                                   MapView.Active.Map, false);
    });
}

{
    QueuedTask.Run(() =>
    {
        if (GridOptionsEnvironment.Instance.HasGridOptions(map))
        {
            //set back to defaults - will overwrite existing
            GridOptionsEnvironment.Instance.SetGridOptions(map, 
                GridOptionsEnvironment.Instance.DefaultGridOptions);
        }
    });
}

{
    QueuedTask.Run(() =>
    {
        if (GridOptionsEnvironment.Instance.HasGridOptions(map))
            GridOptionsEnvironment.Instance.RemoveGridOptions(map);
    });
}