add groovydoc
<groupId>org.codehaus.gmavenplus</groupId>
<artifactId>gmavenplus-plugin</artifactId>
<version>1.5</version>
+ <dependencies>
+ <dependency>
+ <groupId>org.codehaus.groovy</groupId>
+ <artifactId>groovy-groovydoc</artifactId>
+ <version>${groovy.version}</version>
+ </dependency>
+ </dependencies>
</plugin>
<plugin>
