Zend Framework: Can i just get GET params?

[born4null]

In Zend Framework, most of the time to get a param, i will use\[code\]// from controller$this->getRequest()->getParam('key');\[/code\]but how can i get just GET params using the 'Zend' way? Or do i just use \[code\]$_GET\[/code\]? Is there any difference between \[code\]$this->getRequest()->getParam('key');\[/code\]vs \[code\]$_GET['key'];\[/code\]