Not exactly.

That link looks like a Ruby-level drawing demo (and I don’t see a public repo or docs behind it).

ruby-libgd is a native, in-process binding to libgd, focused on deterministic rendering and explicit pixel-level primitives, released under the MIT license.

On top of that, I built libgd-gis (also MIT) as a higher-level standard: map rendering, GeoJSON ingestion, layers, tiles, and reproducible output for GIS-style workloads.

ruby-libgd is the low-level graphics engine; libgd-gis is the map renderer built on it.