1.14.0
The 1.14 release of GeoScript is build on Groovy 2.5.8, GeoTools 22.0, and the Java Topology Suite 1.16.1 and requires Java 8.
https://github.com/geoscript/geoscript-groovy/blob/master/doc/releases.rst
http://geoscript.github.io/geoscript-groovy/api/1.14.0/index.html