shortcode with log lat in variables

I´m not sure where is my mistake.
I include this code in template for a customer post:

<?php the_content();  // <!--  display img in content   -->
                  if (  get_post_meta( $post->ID, 'proyectos_map_location', true ) ) {
				  $gLoc = get_post_meta( $post->ID, 'proyectos_map_location', true );
				  $gLong = substr($gLoc, 0, strpos($gLoc,','));
				  $gLat = substr($gLoc, strpos($gLoc,',')+1);
				  $gLoc = "[bgmp-map  zoom=";
				  $gLoc .= '"13"';
				  $gLoc .= ' long="' . $gLong . '" lat="' . $gLat .'"]';
				  // $gLoc .= "')";
				  echo $gLoc;
				  do_short_code($gLoc);
	//			   echo $gLoc; // with 'do_shot_code' into gLoc
	//				echo do_shortcode('[bgmp-map  zoom="13" long=$gLong lat=$gLat]');

As you can see, Ive tried several options to execute do_short_code but none of them were ok
function bgmpShortcodeCalled() is included in functions.php with right slugs

Thanks in advance for your help
Arturo

http://ww.wp.xz.cn/extend/plugins/basic-google-maps-placemarks/