GS Map is a Godot 4.5 GDExtension that provides editor tools for interacting with Europa Universalis provinces and country data as well as a shader pipeline that renders a map with smooth borders. Features:

Smooth borders using HQX shader
Compute abstraction for generating color_map, lookup_color and political_mask
Export/import functionality based on Europa Universalis 4 format
Custom Inspector window for editing country data