trying Google Tag Manager

_config.yml

@@ -36,6 +36,7 @@ google_fonts:
   - name: "Lora"
     weights: "400,400i,700,700i"
 google_analytics: "G-SST5T761QX" # Google Analytics id, e.g. "UA-NNNNNNNN-N"
+google_tag_manager: "GTM-N2Z38S5B"
 disqus:
   shortname: # Disqus shortname, e.g. "my_disqus_shortname"
 twitter:
@@ -79,6 +80,7 @@ plugins:
   - jekyll-sitemap
   - jekyll-feed
   - jekyll-paginate
+  #- jekyll-google-analytics  #seems to work without this with my otehr modifications updating hte code in scripts.html dealing with google_analytics code
 
 # Front Matter Defaults
 defaults:
@@ -126,7 +128,7 @@ owner:
   weibo: #userid
   google:
     plus: #username
-    analytics: "G-SST5T761QX" #UA-65151620-1
+    analytics: #"G-SST5T761QX" #UA-65151620-1
     verify:
     ad-client:
     ad-slot:

_includes/scripts.html

@@ -14,14 +14,22 @@
 {%- endif -%}
 
 {%- if jekyll.environment == 'production' and site.google_analytics -%}
-<script async src="https://www.googletagmanager.com/gtag/js?id={{ site.google_analytics }}"></script>
-<script>
-  window.dataLayer = window.dataLayer || [];
-  function gtag(){dataLayer.push(arguments);}
-  gtag('js', new Date());
+  <script>
+  if(!(window.doNotTrack === "1" || navigator.doNotTrack === "1" || navigator.doNotTrack === "yes" || navigator.msDoNotTrack === "1")) {
+    (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
+    (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
+    m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
+    })(window,document,'script','https://www.google-analytics.com/analytics.js','ga');
+    ga('create', '{{ site.google_analytics }}', 'auto');
+    ga('send', 'pageview');
 
-  gtag('config', '{{ site.google_analytics }}');
-</script>
+    <!-- Google Tag Manager -->
+    (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':
+    new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0], j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';
+    j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer', '{{ site.google_tag_manager }}');
+    <!-- End Google Tag Manager -->
+  }
+  </script>
 {%- endif %}
 
 {% if site.mathjax == true or site.mathjax.enable == true %}