MongoConsole.groovy

@Grab('com.gmongo:gmongo:0.9.5')
@GrabConfig(systemClassLoader=true)
import com.gmongo.GMongo
import com.mongodb.*
import javax.swing.UIManager
import groovy.ui.Console
import org.codehaus.groovy.control.CompilerConfiguration
import org.codehaus.groovy.control.customizers.ImportCustomizer
import groovy.transform.*


def mongoMenu = {
    menu('Mongo') {
        menu('Templates') {
            menuItem('group')
        }
    }
}

Console.metaClass.newScript = { ClassLoader parent, Binding binding ->
    def config = new CompilerConfiguration()
    def importCustomizer = new ImportCustomizer()
    importCustomizer.addImports('com.gmongo.GMongo')
    config.addCompilationCustomizers(importCustomizer)
    binding.mongo = new GMongo()
    delegate.shell = new GroovyShell(parent, binding, config)
}

UIManager.lookAndFeel = UIManager.systemLookAndFeelClassName
new Console(Console.class.classLoader.getRootLoader()).run(
    Console.frameConsoleDelegates << [menuBarDelegate: {arg->
        current.JMenuBar = build(arg)
        current.JMenuBar.add(build(mongoMenu))
    }]
)