var mySearch = search.load({
    id: 'customsearch_my_so_search'
  });

    var resultSet = mySearch.run();
    var firstResult = resultSet.getRange({
      start: 0, 
      end: 1
    })[0];

    // get the value of the second column (zero-based index)
    var value = firstResult.getValue(resultSet.columns[1]);