JAVA_HOME
ANT_HOME
CATALINA_HOME
GROOVY_HOME
GRAILS_HOME
classpath=.
(%JAVA_HOME%\jre\lib is not required)
Path=%JAVA_HOME%\bin;%ANT_HOME%\bin;%CATALINA_HOME%\bin;%GROOVY_HOME%\bin;%GRAILS_HOME%\bin
Note: if you add %GROOVY_HOME%\embeddable\groovy-all-1.0.jar to classpath Grails can't work correctly.