Show Posts of a specific category on the google maps

gistfile1.txt

add_filter('wpgmp_post_args', 'wpgmp_post_args',1,2 );

function wpgmp_post_args($args,$map) {
	
	global $post;

  	if(is_category(1)) {
  		$args['category__in'] = 1; // Show Posts of Category ID = 1 on the google maps.
  	}
  	
	return $args;
}