You can view Jost Grant's Personal Knowledgebase / Notes / Ideas For The Project Here
Note
This project is exploratory, ad infinitum... and should probably not be used for anything "serious" and/or you plan to maintain for years-and-years; Because Goli may not be here for years-and-years itself, and is like a stepping stone towards something greater or at least more grandiose. But for the time-being exercise extreme caution for personal use, like we are far from a stable api (things can and will break between releases), and the person working on this isn't even too familiar with Godot in-general atm LOL.
Does GOLI mean anything, besides Godot + Lisp?
Yes! It's a homage to G.O.A.L.; The game-programming centered Lisp by NaughtyDog used in the CrashBandicoot x Jak&Daxter series.
What is the file-extensions for Goli?
It's .gol, which is of course visually similar to .gd