title: How to read parameter from the HTTP query string
body: <p>I have the following URL</p>
  
  <pre><code>http://www.example.com/node/add/forum/3?gids[]=13
  </code></pre>
  
  <p>I want to get the value <code>13</code> from within my module.</p>
  
  <p>I've tried with</p>
  
  <pre><code>$_GET['gid[]']
  </code></pre>
  
  <p>and with</p>
  
  <pre><code>$_GET['gids%5B%5D']
  </code></pre>
  
  <p>but I always get <code>null</code>.</p>
  
  <p>How can I do this?
  Thanks</p>