GCMS doesn't hurt...u will get the current status of ur application.... but it takes like one month to receive it... So the status would be one month old in tht regard...
As far as I know, u cannot include ur parents in the PR application. Dependents may include ur spouse and kids. But in the form u have to include ur parents/sibling/spouse/kids info.
Really :o Then I would suggest to email CIC with ur application id and ask them to add the email id to ur application. I am not sure about the which email id to use though. Get it confirmed.