This plugin helps you to add google maps to your posts and pages easily. You can create locations and display the map for that location with shortcodes. You can assign categories to locations. You can show a single location, locations of specified categories or all the locations based on your requirements. You can also filter a multi location map by categories and customize the height, width, zoom level and maptype of any map. Front end demo: http://plugins.auratechmind.net/easy-wp-gmaps/