Hello,
Today I linked my application (MPNP) [paper based] to GCKey based online account. I found that there are several steps such as: 
Application status We are processing your application. We will send you a message when there is an update or if we need more information from you.  Help - Application status
Review of eligibility :We are reviewing whether you meet the eligibility requirements.  Help - Review of eligibility
Review of medical results :You do not need a medical exam. We will send you a message if this changes.  Help - Review of medical results
Review of additional documents :The additional documents you provided have been uploaded.  Help - Review of additional documents
Interview :You do not need an interview. We will send you a message if this changes.  Help - Interview
Biometrics: We do not need your fingerprints. We will send you a message if this changes.  Help - Biometrics
Background check :We are processing your background check. We will send you a message if we need more information.  Help - Background check
Final decision :Your application is in progress. We will send you a message once the final decision has been made. 
However, from GCMS notes It was stated that, eligibility passed, medical passed, criminality passed. I just wonder why in GCkey its showing eligibility is under review. Anybody could shed some light. How long should I have to wait. My medical is already expired. 
Thanks and regards,
Eusufzai