Pre-select option in dropdown menu with URL – Blancer.com Tutorials and projects

I’m working with this code snippet:

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<script>
// <![CDATA[
 $(document).ready(function() {
  // Parse your query parameters here, and assign them to a variable named `queryParams`
  var option = queryParams.type;
  $("#GCValue").val(option);
 });
 // ]]>
</script>

I don’t have a lot of latitude with how I can affect the page, this is in the <body> section of the page, since I don’t have access to the <head> tag.

I have this form:

<select id=GCValue>
  <option val="10">10</option>
  <option val="25">25</option>
  <option val="50">50</option>
  <option val="100">100</option>
  <option val="250">250</option>
</select>

and I would like to use the URL of the page to select one of these five options (currently default is 10). I think it’s supposed to be either https://www.mywebsite.com/gift-card/?type=2 or https://www.mywebsite.com/gift-card/?GCValue=2 but neither work. I’m pretty new to JS and JQuery, so I know I have to be doing something wrong. Any help appreciated.