I've never worked with Groovy before.
I installed the executable and the latest JDK from the Java website.
I set my system ENV variables
C:\Program Files\Java\jdk1.8.0_77 and
C:\Program Files (x86)\Groovy\Groovy-2.4.6\bin.
Console won't load, so I tried to restart my computer. No dice. I tried running GroovyConsole.exe directly from the groovy folder, as well as trying the GroovyConsole.bat file.
It won't work and all of the above are the only solutions I've found online.