"labelRotation:45" is defined to rotate the X-axis label to 45 degrees.
The label can be rotated only if the internal fonts are used.
fontFamily:Myriad - Using the embeded font
ā—¸Layout
<horizontalAxisRenderers>
<Axis2DRenderer axis="{hAxis}" styleName="xAxisStyle" showLine="true"/>
</horizontalAxisRenderers>
<Style>
.xAxisStyle { fontFamily:Malgun Gothic;fontSize:11;labelRotation:45;}
</Style>