Reference using LaTeX style \ref for titles/text

**Description of the desired feature**
I am writing my thesis using LaTeX and want to make a map which shows the location of data that I am showing in other figures. Ideally the figure numbers could be automatically generated, to make a map looking something like this:
As figure numbers can change when more figures are added automatic generation would save lots of time and ensure consistency and correctness too.

It is already possible to include LaTeX equations, but from what I can see this doesn't extend to other LaTeX macros.
Does anyone know what would be involved in implementing this feature?

**Are you willing to help implement and maintain this feature?** Not for a few months...

Looking forward to some discussion on this, I'm very impressed with GMT overall and the community seems really great.

Cheers