Google Analytics loaded via wp_print_scripts

functions.php

/*
  DELETE THIS COMMENT BLOCK
  1. replace 'yourtheme' in yourtheme_google_print_scripts with your theme name
     - it occurs twice in the code below
  2. replace the URL below that ends with 'ABC123' with your URL
  3. replace 'ABC123' argument below in the 'gtag' function
  4. Paste all of the code to the bottom of your functions.php file in the child theme or custom theme
*/
function yourtheme_google_print_scripts() { ?>
<!-- Global site tag (gtag.js) - Google Analytics -->
<script async src="https://www.googletagmanager.com/gtag/js?id=G-ABC123"></script>
<script>
  window.dataLayer = window.dataLayer || [];
  function gtag(){dataLayer.push(arguments);}
  gtag('js', new Date());

  gtag('config', 'G-ABC123');
</script>

	<?php

}
add_action('wp_print_scripts', 'yourtheme_google_print_scripts');