Is there a way to integrate GoodNotes (pages or notebooks) with Notion?
There is no GoodNotes integration through the Notion API, that is something that only GoodNotes developers can make it happen.
But you can embed and see your GoodNotes documents in Notion following the next steps.
Select your notebook, click the dropdown and select Share Link, get the sharable link, toggle preview on web, click send link and copy the link. Paste that in a Notion embed block and done.
That way you will see an updated GoodNotes document inside your Notion page or workspace.