The GM_PointStyle_t type exposes the following members.
Render the label for this line if there is one
Render the label for this line even if it collides with another display label
Font to use to render label
rotation angle in degrees (0 is up/north, 90 right/east, etc.) OR'd with rotation sense flags (GM_RotationSense_t16)
Symbol scaling factor to apply (use negative values to make symbol a fixed height in meters, i.e. -10 would make symbol 10 meters high)
Name of symbol