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

if ( function_exists( 'groovy_menu' ) ) {
	groovy_menu();
}

Bridge Child Theme with Groovy Mega Menu 

Note: You can find archive with Bridge Theme inside the plugin, please follow toGroovy Menu > Integration section

header.php

<?php
// Prevent file from being loaded directly
if ( ! defined( 'ABSPATH' ) ) {
	die( '-1' );
}

if ( ! function_exists( 'bridge_qode_child_theme_enqueue_scripts' ) ) {

	Function bridge_qode_child_theme_enqueue_scripts() {
		wp_register_style( 'bridge-childstyle', get_stylesheet_directory_uri() . '/style.css' );
		wp_enqueue_style( 'bridge-childstyle' );
	}

	add_action( 'wp_enqueue_scripts', 'bridge_qode_child_theme_enqueue_scripts', 11 );
}

header.php

<?php
$bridge_qode_options = bridge_qode_return_global_options();
?>
<!DOCTYPE html>
<html <?php language_attributes(); ?>>
<head>
	<meta charset="<?php bloginfo( 'charset' ); ?>"/>
	<?php
	$bridge_qode_is_IE = bridge_qode_return_is_ie_variable();

	if ( ! empty( $bridge_qode_is_IE ) && $bridge_qode_is_IE ) { ?>
		<meta content="IE=edge,chrome=1" http-equiv="X-UA-Compatible">
	<?php } ?>

	<?php
	/**
	 * bridge_qode_header_meta hook
	 *
	 * @see bridge_core_header_meta() - hooked with 10
	 * @see bridge_qode_user_scalable_meta() - hooked with 10
	 */
	do_action( 'bridge_qode_action_header_meta' );
	?>

	<link rel="profile" href="http://gmpg.org/xfn/11"/>
	<link rel="pingback" href="<?php bloginfo( 'pingback_url' ); ?>"/>

	<?php wp_head(); ?>
</head>

<body <?php body_class(); ?> itemscope itemtype="http://schema.org/WebPage">
<?php
//Groovy Menu Integration ---start
if ( function_exists( 'groovy_menu' ) ) {
	groovy_menu();
}
//Groovy Menu Integration ---end
?>
<?php
//Wordpress 5.2 default action
do_action( 'wp_body_open' );

?>

<?php
$params = bridge_qode_header_parameters();
extract( $params );

echo bridge_qode_get_module_template_part( 'templates/parts/ajax-loader', 'header' );

echo bridge_qode_get_module_template_part( 'templates/side-area/side-area', 'header', '', $params );
echo bridge_qode_get_module_template_part( 'templates/panel-area', 'panel-area', '', $params );
?>

<div class="wrapper">
	<div class="wrapper_inner">

		<?php do_action( 'bridge_qode_action_after_wrapper_inner' ); ?>

		<?php
		//Groovy Menu Integration ---start
		if ( ! function_exists( 'groovy_menu' ) ) {
			?>

			<?php
			if ( $enable_vertical_menu ) {
				echo bridge_qode_get_module_template_part( 'templates/vertical-header', 'header', '', $params );
			} else {
				switch ( $header_bottom_appearance ) {
					case 'stick menu_bottom':
						$header_appearance_slug = 'stick_menu_bottom';
						break;
					case 'fixed fixed_minimal':
						$header_appearance_slug = 'fixed_minimal';
						break;
					default:
						$header_appearance_slug = $header_bottom_appearance;
						break;
				}
				echo bridge_qode_get_module_template_part( 'templates/header-appearance/header', 'header', $header_appearance_slug, $params );
			}

			echo bridge_qode_get_module_template_part( 'templates/parts/back-to-top', 'header', '', $params );
			echo bridge_qode_get_module_template_part( 'templates/popup-menu/popup-menu', 'header', '', $params );
			echo bridge_qode_get_module_template_part( 'templates/parts/fullscreen-search', 'header', '', $params );
			?>

			<?php
		}
		//Groovy Menu Integration ---end
		?>


		<?php if ( bridge_qode_options()->getOptionValue( 'paspartu' ) == 'yes' ){ ?>
		<div class="paspartu_outer <?php echo bridge_qode_get_paspartu_class(); ?>">
			<?php if ( bridge_qode_options()->getOptionValue( 'vertical_area' ) == "yes" && bridge_qode_options()->getOptionValue( 'vertical_menu_inside_paspartu' ) == 'no' ) { ?>
			<div class="paspartu_middle_inner">
				<?php } ?>

				<?php if ( ( bridge_qode_options()->getOptionValue( 'paspartu_on_top' ) == 'yes' && bridge_qode_options()->getOptionValue( 'paspartu_on_top_fixed' ) == 'yes' ) ||
				           ( bridge_qode_options()->getOptionValue( 'vertical_area' ) == "yes" && bridge_qode_options()->getOptionValue( 'vertical_menu_inside_paspartu' ) == 'yes' ) ) { ?>
					<div class="paspartu_top"></div>
				<?php } ?>

				<div class="paspartu_left"></div>
				<div class="paspartu_right"></div>
				<div class="paspartu_inner">
					<?php } ?>

					<?php if ( is_active_sidebar( 'left_side_fixed' ) ) { ?>
						<div class="qode_left_side_fixed">
							<?php
							dynamic_sidebar( 'left_side_fixed' );
							?>
						</div>
					<?php } ?>

					<?php if ( is_active_sidebar( 'right_side_fixed' ) ) { ?>
						<div class="qode_right_side_fixed">
							<?php
							dynamic_sidebar( 'right_side_fixed' );
							?>
						</div>
					<?php } ?>

					<div class="content <?php echo bridge_qode_get_content_class(); ?>">
						<?php
						$animation = get_post_meta( $id, "qode_show-animation", true );
						if ( ! empty( $_SESSION['qode_animation'] ) && $animation == "" ) {
							$animation = $_SESSION['qode_animation'];
						}
						if ( in_array( bridge_qode_options()->getOptionValue( 'page_transitions' ), array(
								'1',
								'2',
								'3',
								'4'
							) ) || in_array( $animation, array( "updown", "fade", "updown_fade", "leftright" ) ) ) { ?>
							<div class="meta">

								<?php
								/**
								 * bridge_qode_action_ajax_meta hook
								 *
								 * @hooked bridge_qode_action_ajax_meta - 10
								 */
								do_action( 'bridge_qode_action_ajax_meta' ); ?>

								<span id="qode_page_id"><?php echo esc_attr( bridge_qode_get_page_id() ); ?></span>
								<div class="body_classes"><?php echo implode( ',', get_body_class() ); ?></div>
							</div>
						<?php } ?>
						<div class="content_inner <?php echo esc_attr( $animation ); ?> ">
							<?php if ( in_array( bridge_qode_options()->getOptionValue( 'page_transitions' ), array(
									'1',
									'2',
									'3',
									'4'
								) ) || in_array( $animation, array( "updown", "fade", "updown_fade", "leftright" ) ) ) {
								do_action( 'bridge_qode_action_visual_composer_custom_shortcodce_css' );
							} ?>