Try this : below code works for me
Use HorizontalScrollBarVisibility and VerticalScrollBarVisibility instead of HorizontalScrollMode VerticalScrollMode
<ScrollViewer HorizontalScrollBarVisibility="Visible" VerticalScrollBarVisibility="Disabled">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="600" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<Grid x:Name="LeftHeaderPanel" />
<GridView Grid.Column="1" ScrollViewer.HorizontalScrollBarVisibility="Disabled" ScrollViewer.VerticalScrollBarVisibility="Disabled"/>
</Grid>
</ScrollViewer>