To do search:

require("gsAPI.php");

$gsapi = new gsapi('key', 'secret');

$gsapi->startSession();
//please cache this session and use setSession('session')

$gsapi->getCountry($_SERVER['REMOTE_ADDR']);
//just need to call this, it will store itself in gsapi

require("gsSearch.php");

$gsSearch = new gsSearch();
$gsSearch->setTitle('song title');

$results = $gsSearch->songSearchResults();