bp_group_get_group_type_id( string $group_type = '' )

function bp_group_get_group_type_id( $group_type = '' ) {

	$args             = array(
		'post_type'  => 'bp-group-type',
		'meta_query' => array(
			array(
				'key'   => '_bp_group_type_key',
				'value' => $group_type,
			),
		),
	);
	$group_type_query = new WP_Query( $args );

	$posts = $group_type_query->posts;

	$id = ( is_array( $posts ) && isset( $posts[0]->ID ) ) ? $posts[0]->ID : 0;

	return $id;
}