Add this code into header.php of your child theme.

Please make all changes to the child theme files, and do not add the code directly to the theme files, otherwise after updating the theme your fixes will be lost

header.php

// For UNCODE theme integration is too complex. Please use the Child Theme
// http://updates.grooni.com/theme-demos/gm-child-themes/uncode-gm-child.zip

// Groovy Menu integration code
if ( function_exists( 'groovy_menu' ) ) {
	groovy_menu();
}
Note: You can find the child theme for the Uncode Theme in the Groovy Menu > Integration section