Taxonomy filter with checkbox custom field

I have taxonomy template set up that shows only related custom posts based on their tag. I would like to further refine these results by hiding some of the posts. I have created a “hidden” meta checkbox and I’d like to add a line to my query in that template to hide any posts that have the box checked.

Here is what I tried, but I can’t seem to get any variation of it to work…

$term = get_term_by(  'slug',  get_query_var( 'term' ),  get_query_var( 'taxonomy' )  );
			global $wp_query;
			query_posts( array(
			"$term->taxonomy" => "$term->slug",
			'orderby' => 'title',
			'order' => 'ASC',
			'meta_key'=>'gcw_hide',
			'meta_value'=> 0,
			'showposts' => 100 )
			);

As soon as I add this line:

‘meta_value’=> 0,

I get zero results. Based on my test data, I should have a different set of results for the checked and unchecked posts. Any clues?