My fiancee has not done hers yet but I was watching a bunch of videos from Filipinas that have done theirs in the last few months so we can be prepared for what to expect. When they demonstrated the booking process, the calendar looked pretty open... Less than a week wait.
At the end of the GCP session when you are checking out, they give you a QR code to scan and it will email the completion certificate to you. Make sure you check it for accuracy in the information contained (spelling of names, destination country, etc.) and make sure there is no expiration date on it.