Add JS to specific pages AFTER all other JS
Using the following in my template.php file for my theme, I achieved what I wanted to do.

function MY_THEME_preprocess_page(&amp;$vars) {
  if (isset($vars['node']) &amp;&amp; $vars['node']-&gt;type == 'venue') {
    drupal_add_js(drupal_get_path('theme', 'MY_THEME') . '/js/mapstyle.js',
    array('weight' =&gt; 15));
  }
}


I couldn't add the JS to my .info file as it would add to all pages, so I used the drupal_add_js fallback in template.php, and the now the error no longer shows on a page that doesn't have a GMAP on it.