Is there a well known tutorial/repo that takes notion data and connects to GPT?

(Many) startups use notion as their wiki and a GPT based solution that people can ask questions to about things at the company (e.g. what does this TLA stand for?) and hooked up to slack sounds like something that would be first to be solved. Aware of langchain, and other pieces, but is there like an open source repo where I could just like build a source adapter via an interface or something?