Grid gallery post type with working pagenation

/*
Template Name: Photo templates
*/
get_header(); ?>

<div id="gridcontainer">
<?php

$counter = 1; //start counter

$grids = 2; //Grids per row

$temp = $wp_query;
  $wp_query = null;
  $wp_query = new WP_Query();
  $wp_query->query('showposts=12&post_type=gallery'.'&paged='.$paged);

  while ($wp_query->have_posts()) : $wp_query->the_post();
?>

<?php
//Show the left hand side column
if($counter == 1) :
?>
			<div class="griditemleft">
				<div class="postimage">
<h2><a href="<?php the_permalink(); ?>"><?php the_title(); ?></a></h2>
<a href="<?php the_permalink(); ?>"><?php the_post_thumbnail('archive-gallery-thumb'); ?></a>
				</div>
                </div>
<?php
//Show the right hand side column
elseif($counter == $grids) :
?>
<div class="griditemright">
				<div class="postimage">
<h2><a href="<?php the_permalink(); ?>"><?php the_title(); ?></a></h2>
<a href="<?php the_permalink(); ?>"><?php the_post_thumbnail('archive-gallery-thumb'); ?></a>
				</div>
</div>
<div class="clear"></div>
<?php
$counter = 0;
endif;
?>
<?php
$counter++;
endwhile;?>
<div class="page-numbers">
<?php wpmy_pagination();?>
</div>
<?php
$wp_query = null;
$wp_query = $temp;  // Reset
?>

</div>

<?php get_footer(); ?>