line spacing with GUIStyle

I’m using OnGUI and a GUIStyle to place text onscreen. It’s a long sentence in it’s rectangular area, so it ‘word-wraps’ into 4 lines.

But the line spacing is too far apart. How do I tweak this value?

With GUIStyle I’m afraid that is not possible. The only possible way I thought was to add the spacing to the font characters and then import it to unity…