guiText.pixelOffset = Vector2 (10, 10);

using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
    void Example() {
        guiText.pixelOffset = new Vector2(10, 10);
    }
}

import UnityEngine
import System.Collections

class example(MonoBehaviour):

    def Example():
        guiText.pixelOffset = Vector2(10, 10)