• Certain Google applications may be listed under full account access.
• The app also does ask for extensive permissions, which according to some accounts potentially gives it access to everything in your Google accounts (which can be used to sign up for a Pokemón GO account).
• When you grant full account access, the application can see and modify nearly all information in your Google Account (but it can’t change your password, delete your account, or pay with Google Wallet on your behalf).
• Pokémon GO only accesses basic Google profile information (specifically, your User ID and email address) and no other Google account information is or has been accessed or collected.
• Google has verified that no other information has been received or accessed by Pokémon GO or Niantic.

Read more