Appian & Google SAML Setup

Hello All, 

We are trying to configure Google SAML as our Appian authentication provider. However, Google does not provide the private key of the certificate (It only provides the public key). Also it does not let us to upload our own Certificate public and private key. On the other hand, Appian only accepts certificates that have both private and public keys. 

As a result we are stock. I was wondering if anyone in community has setup Google SAML as their authentication service. 

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