Staggering buttons with GUI.SelectionGrid

There is no way to align the items within a selection grid afaik. I used toggle buttons with a button skin for that and controlled their state by an array.

just a small example:

 bool[] myStates = new bool[3]{true, false, false};

 ...

 GUILayout.BeginHorizontal(); //your custom layout instead
 {
     if(GUILayout.Toggle(myStates[0], "Pay", myButtonStyle))
     {
         CheckState(myStates, 0);
     }
     if(GUILayout.Toggle(myStates[1], "Politics", myButtonStyle))
     {
         CheckState(myStates, 1);
     }
     if(GUILayout.Toggle(myStates[2], "Strike", myButtonStyle))
     {
         CheckState(myStates, 2);
     }
 }
 GUILayout.EndHorizontal();

 ...

 protected void CheckState(bool[] values, int selectedIndex)
 {
     for (int i = 0; i < values.Length; i++) 
     {
         values[i] = i == selectedIndex;
     }
 }