If you install the toolkit in a venv, you may want to edit run_linter.gd to set the path to the gdlint binary (e.g. venv/bin/gdlint). That way, you won't have to run Godot through a venv just to use gdlint.

About

This is an extremely simple implementation -- the plugin runs gdlint on save, and raises any errors as warnings.

If you want more full-featured linter integration, check out el-falso/gdlinter. When I wrote this plugin, it wasn't being actively maintained.