Hi, Sandra.
I believe you need to configure it to work something like that:
1. You configure your web servers to use your Gluu CE host as IdP or OP (depending on which protocol, SAML or OpenID Connect respectively, you will choose to use for protecting your apps)
2. At Gluu CE instance you can use our pre-packaged custom authentication script (as described [here](https://www.gluu.org/docs/articles/social-login-google/)) to allow your visitors (sent there from your web server for authentication) to log in using their Google accounts.
You can find a lot of documentation on how to configure web servers for SAML or OIDC SSO for each well-known web server solution over Internet.
Regards,
Alex.