Unity Script Reference:

static function SelectionGrid(selected: int, texts: string[], xCount: int, params options: GUILayoutOption[]): int;

static function SelectionGrid(selected: int, images: Texture[], xCount: int, params options: GUILayoutOption[]): int;

static function SelectionGrid(selected: int, content: GUIContent[], xCount: int, params options: GUILayoutOption[]): int;

static function SelectionGrid(selected: int, texts: string[], xCount: int, style: GUIStyle, params options: GUILayoutOption[]): int;

static function SelectionGrid(selected: int, images: Texture[], xCount: int, style: GUIStyle, params options: GUILayoutOption[]): int;

static function SelectionGrid(selected: int, contents: GUIContent[], xCount: int, style: GUIStyle, params options: GUILayoutOption[]): int;

Parameters

selected	The index of the selected button.
texts	An array of strings to show on the buttons.
images	An array of textures on the buttons.
contents	An array of text, image and tooltips for the button.
xCount	How many elements to fit in the horizontal direction. The elements will be scaled to fit unless the style defines a fixedWidth to use. The height of the control will be determined from the number of elements.
style	The style to use. If left out, the `button` style from the current GUISkin is used.
options	An optional list of layout options that specify extra layouting properties. Any values passed in here will override settings defined by the `style`. See Also: GUILayout.Width, GUILayout.Height, GUILayout.MinWidth, GUILayout.MaxWidth, GUILayout.MinHeight, GUILayout.MaxHeight, GUILayout.ExpandWidth, GUILayout.ExpandHeight.

Returns
int The index of the selected button.

Description

Make a Selection Grid.

Selection grid in the Game View.

	var selGridInt : int = 0;
	var selStrings : String[] = ["Grid 1", "Grid 2", "Grid 3", "Grid 4"];	function OnGUI () {
		selGridInt = GUILayout.SelectionGrid (selGridInt, selStrings, 2);
	}

using UnityEngine;
using System.Collections;

public class Example : MonoBehaviour {
    public int selGridInt = 0;
    public string[] selStrings = new string[] {"Grid 1", "Grid 2", "Grid 3", "Grid 4"};
    void OnGUI() {
        selGridInt = GUILayout.SelectionGrid(selGridInt, selStrings, 2);
    }
}

import UnityEngine
import System.Collections

public class Example(MonoBehaviour):

	public selGridInt as int = 0

	public selStrings as (string) = (of string: 'Grid 1', 'Grid 2', 'Grid 3', 'Grid 4')

	def OnGUI() as void:
		selGridInt = GUILayout.SelectionGrid(selGridInt, selStrings, 2)