I have figured out I must use GRAVATAR service when I want to change my avatar. However, I have read in Avatar changed into my Facebook picture after adding Facebook to my account? that Facebook avatars are pulled automatically. Is there any possibility to pull my avatar from Google account? I use my G-mail to log in to all Stack Exchange sites, and I have got avatar assigned there; it's my G+ avatar.
Is there the possibility? If there is this possibility, is any configuration or permission granting required?