Go to Google developer console, make a new Project and enable 'Google+API' service

Go to the 'Credentials' and Add the following:

Add the local root url of your service as 'Authorized Javascript Origin'

Example: http://localhost:8000 ( in case of lms )

Add the 'Authorized redirect URI'

Example: http://localhost:8000/auth/complete/google-oauth2// ( in case of lms )

Click 'Save'

Create/extend the 'private.py' by the following:

from django.conf import settings

settings.FEATURES['ENABLE_THIRD_PARTY_AUTH'] = True
settings.AUTH_TOKENS['THIRD_PARTY_AUTH'] = {
"Google": {
"SOCIAL_AUTH_GOOGLE_OAUTH2_KEY":"{client ID}",

"SOCIAL_AUTH_GOOGLE_OAUTH2_SECRET":"{client secret}"

}
}

Execute the following command on local mysql db:

INSERT INTO third_party_auth_oauth2providerconfig VALUES ('1', '2015-07-01 18:29:39.000000', '1', 'fa-google-plus', 'Google', '0', '0', '0', 'google-oauth2', '{client ID}', '{client secret}', '{}', NULL, '', '1', 'google-oauth2', '1');

Restart all the services
Note: Replace 'client ID' and 'client secret' from the credentials of the google console project.