Change map's zoom level according to page type.

gistfile1.txt

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

function wpgmp_maps_options($map_settings,$map) {
	
	global $post;

	if(is_front_page()) {
		$map_settings['zoom'] = 15;	
	} else if(is_single()) {
		$map_settings['zoom'] = 10;	
	} else {
		$map_settings['zoom'] = 5;
	}
  	
	return $map_settings;

}