The 1.22.0 release of GeoScript is build on Groovy 4.0.15, GeoTools 30, and the Java Topology Suite 1.19.0 and requires Java 11.
Release Notes:
https://github.com/geoscript/geoscript-groovy/blob/master/doc/releases.rst
API:
http://geoscript.github.io/geoscript-groovy/api/1.22.0/index.html
Cookbook:
https://geoscript.github.io/geoscript-groovy/cookbook/1.22.0/index.html