Sending an Email with Google Registration?

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I'm working on an internal company project that I'm allowing people to automatically register with their Gmail accounts so they don't need to make user accounts and have to remember more logins and passwords. I however need to manage the accounts after they're created to add some personalized data to each individual employee (currently accounts are automatically registered to a "New Users" group that I then move to its correct location after inputting some manual data).

I would like to receive an email when a new user registers so I can immediately go in and enter the correct data for each employee, but I cannot seem to find a way to make it auto send an email to myself. I know when a user registers via Concrete authentication, I can set that to send an email, but even with that enabled, if someone registers via Google, I receive nothing (and I actually don't want people making accounts through the Concrete registration so I'd much rather keep this off).

Is there a way to get notified when a new user registers through Google?