affiliate-trigger.js

/*
This code will live on every single page.
It is a replacement for manually adding static script tags
to each page and it informs the  gftracker with all 
the information it needs. Also, you are not limited to just 
the 4 examples you provided in case you need to add more later.
*/
function affiliate(id = '', product = '') {
  var url = 'https://www.gftracker.com/rd/jpx.php',
      get = { sid: 24, transid: id, event: product }

  fetch(url + '?' + Object.keys(get).map(key => key + '=' + get[key]).join('&'), { mode: 'no-cors' })
      .then(function(response) {})
}

/*
This code runs only on the purchase completed page
and triggers the above method with the correct data 
to send to the tracker.
*/
affiliate('Fundamentals_Purchase', '310438')