[Adrian Schneider]

PHP Code:

 $vbulletin->input->clean_array_gpc('p', array(
    'gbID'    => TYPE_NOHTML,
    'userID'  => TYPE_NOHTML,
    'date'    => TYPE_NOHTML,
    'message' => TYPE_NOHTML,
    'Submit'  => TYPE_NOCLEAN,
    'u'       => TYPE_UINT
));


if ($vbulletin->GPC['submit'])
{
    $vbulletin->db->query_write("
        INSERT INTO " . TABLE_PREFIX . "RobinsGB
            (gbID, userID, `date`, message)
        VALUES (
            '" . $db->escape_string($vbulletin->GPC['gbID']) . "',
             " . $vbulletin->userinfo['userid'] . ",
            '" . $db->escape_string($vbulletin->GPC['date']) . "',
            '" . $db->escape_string($vbulletin->GPC['message']) . "'
        )
    ");
    
    // redirect?
} 


You had various syntax errors, typos, etc. Someone else can look at the various logical errors and see if they can make sense of it.