mavengem protocol converts a rubygems repository on the fly to a maven repository and the mavengem wagon uses it to provide gem artifacts to maven POMs
'org.torquebox.mojo:mavengem:0.2.0'
<dependency>
<groupId>org.torquebox.mojo</groupId>
<artifactId>mavengem</artifactId>
<version>0.2.0</version>
</dependency>
<dependency org="org.torquebox.mojo" name="mavengem" rev="0.2.0"/>
"org.torquebox.mojo", "mavengem", "0.2.0"