I was looking further into it @arilsonbarcelos , and actually the upstream IdP’s scopes should be under:
“upstream_params”: {"connection_scope": {
"value": "https://www.googleapis.com/........"
}}
Also, make sure that the application registered on the Google side has appropriate scopes allowed.
We have a Knowledge Solution for analogic use-case, maybe you find it helpful for general steps: Accessing Additional Scopes in Google Social Connection