Google Analytics Global Site Tag (gtag.js) for Facebook Instant Articles

gtag4fbia.js

<!-- Global site tag (gtag.js) - Google Analytics -->
<script async="async" src="https://www.googletagmanager.com/gtag/js?id=UA-XXXXXXXX-X"></script>
<script>
  window.dataLayer = window.dataLayer || [];
  function gtag(){dataLayer.push(arguments)};
  gtag('js', new Date());

  gtag('set', 'page_title', 'FBIA: '+ia_document.title);
  gtag('set', 'campaignSource', 'Facebook');
  gtag('set', 'campaignMedium', 'Social Instant Article');

  gtag('config', 'UA-XXXXXXXX-X');
</script>

@danielmcclure Does setting campaignSource like this actually works for you? Just tried to set those but no data is being registered in the Campaigns either way...

Not working

Not working here either.

Same, not working

Check this out: https://stackoverflow.com/questions/50231721/how-to-track-utm-source-in-google-analytics-using-gtag

Do it this way:
gtag('set', 'campaign', { medium: '', source: '', name: '', content: '' }); // code to send pageview / event

Or if you are doing this with the initial page view:
gtag('config', ''UA-XXXXXXX-X', { campaign: { medium: '', source: '', name: '', content: '' } );