// Dont use gravity on this cloth regardless if is Interactive or Skinned.

transform.GetComponent(Cloth).useGravity = false;

using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
void Awake() {
transform.GetComponent<Cloth>().useGravity = false;
}
}

import UnityEngine
import System.Collections

class example(MonoBehaviour):

def Awake():
transform.GetComponent[of Cloth]().useGravity = false