In netsuite help for result.GetResult (column) they show this code:
//Add additional code
...
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]);
log.debug({
title: 'Value:',
details: value
});
...
//Add additional code