Track Gravity Forms in Google Tag Manager

GravityForms-GTM

<? php
add_action( 'gform_after_submission', 'access_entry_via_field', 10, 2 );
function access_entry_via_field( $entry, $form ) {
echo "<script>var entryField = ". json_encode($entry) .";",
"var formData = ". json_encode($form) .";", 
"var dataLayer = window.dataLayer || [];",
"dataLayer.push({'event':'formSubmit','formTitle': formData['title'] + ' ('+formData['id']+')','submissionID':entryField['id'],'formFields':entryField });",
"console.log(dataLayer)</script>";  
};
?>