Custom GPTs access to site that requires login

Hi all, id like to build a custom GPTs that uses a confluence website as it’s knowledge base. The idea being that a user from work can ask it questions relating information we have in confluence.
The doubt that i have, is that our confluence page requires authentication via google (email/password), so how could i get the customer GPTs to access our confluence?

You would need to build a confluence integration or export your knowledgebase from confluence and upload as a file input to your GPT

Thanks. when you say confluence integration, is that possible to do with the customer GPTs? If so, do you know of any tutorials/demos for something like this?