I have found the next caveat:
Extending DiRMI ClassResolver and Environment class.
class ClasspathResolver implements ClassResolver {
   
     public Class resolveClass(String name)
         throws ClassNotFoundException {
         return Thread.currentThread().contextClassLoader.loadClass(name)        
     }
   
}
class GEnvironment extends Environment {
   
     public Session newSession(ChannelBroker broker) throws IOException {
         def session = super.newSession(broker)
         session.classResolver = new ClasspathResolver()
         return session        
     }
   
}
And that's all folks! It works!