Google Tag Manager for Gravity Forms

gravity-forms-gtm.php

<?php
add_action( 'gform_after_submission', 'braums_after_submission', 10, 2 );
function braums_after_submission( $entry, $form ) {
	?>
	<script>
	function braums_datalayer_push() {
		var form_submission = sessionStorage.getItem('entry_<?php echo absint( $entry[ 'id' ] ); ?>');
		if ( null == form_submission ) {
			if ( typeof( dataLayer ) != 'undefined' ) {
		    	dataLayer.push({'event': 'BWTrackEvent',
					'BWTrackCategory':'Form Submit',
					'BWTrackAction':'form-submit',
					'BWTrackLabel':'{{<?php echo esc_js( $form['title'] ); ?>}}::{{<?php echo esc_js( $entry['id'] ); ?>}}',
					'BWEntryData':<?php echo json_encode( $entry ); ?>
					});
				sessionStorage.setItem("entry_<?php echo absint( $entry[ 'id' ] ); ?>", "true");

			}
		}
		
	}
	braums_datalayer_push();
	</script>
	<?php
}