Exemplo de evento do TableGateway do ZF2

gistfile1.php

public function saveAction()
{
    $tableGateway = $this->getTable('Application\Model\Post');
    $em = new EventManager;
    $em->attach('postInsert', array($this, 'postInsert'));

    $eventFeature = new EventFeature($em);
    $tableGateway->getFeatureSet()->addFeature($eventFeature);
}

/**
 * Será executado no postInsert do TableGateway
 * @return void
 */
public function postInsert()
{
}