Woah, that grid map and meshlib sounds cool. Unity has something similar (tilemap of gameobjects) but it's a pain to work with. I'd be interested in trying to make a game in Godot someday.
It is ^^ even if like i said i can’t really compare with what other engines use cause i’ve stuck with Godot ever since i started making games. If you’ve mostly worked with Unity i know Godot has a version that uses C# so that might feel a bit more familiar if you ever want to try the engine out. Oh and about the gridmap specifically here’s the tutorial where i learned how to use them, they even detail a bit about how to prepare your models in blender and how to export for use in the engine, so it’s pretty handy :)