Hi,
I’m a bit confused by your message, but I might be lacking technical skills to understand it…
Do you want to embed a GD project inside a webpage, or do you want to import/export data to/from a GD project?
For the first one, GD projects can be embedded in any webpage (eg itch.io, kongregate, etc) no need to “take the user to a different page”.
For the second one, you can use the Network actions/conditions (POST/GET stuff).