Turn a field on/off in product listing

I've created a new product type that merely added one field. I've also coded product_listing to display the field on the listing page. 90% of the customer's products will need this field, but there are a few to include Gift Cards (Gift Certificates) that I would rather not have it show.

Is there a bit of code that could be added to the template that could detect the product type and if not product_type 6 don't display field?

I'm not quite sure how to go about this. Any suggestions would be greatly appreciated.

You would need to customize the product listing files so that when the products_type is not your new Product Type the individual listing will exclude that field ...

$query = "SELECT your_field, FROM your_table WHERE product_type='6' and products_status='1' ;
$result = mysql_query($query) or die(mysql_error());
// Print out result
while($row = mysql_fetch_array($result)){
echo $row['your_field to be displayed'];

}

?>