GHL already has an awesome workflow builder that works visually like a mind map.

I think it could be a really cool new feature to take roughly the same visual look and make a built-in mind map feature similar to FigJam or XMind, etc.

This likely wouldn't be hard to code or create since many of the elements are already present in the workflow builder. GHL recently added sticky notes and other kinds of notes into the workflow builder.

So envision the workflow builder, but without triggers and actions. Instead, it has sticky notes that can be freely moved throughout the page and you can draw connector lines between the notes however you want.