See gdx-lml-vis.
This is an example project using LML templates to create GUI. Java part of the code explores some of the more advanced gdx-lml functionalities, like creating custom tags, macros and attributes. Example templates include usage of most tags and macros available in gdx-lml-vis by default - only GWT-incompatible features were excluded.
Check it out on-line here (be careful through: on-line version might be slightly outdated or use latest snapshot with new features).
