Appending a GP template URL?

Yes – let me get back to you. If I can figure it out – I will post the answer. That may spark a better idea for you that is better suited for generate Press.

<?php
if ( is_singular( 'position' ) ) :
    $job_slug    = get_post_field( 'post_name', get_the_ID() );
    $position_id = get_the_ID();
?>
<script>
document.addEventListener('DOMContentLoaded', function () {
    var button = document.querySelector('.gb-button-370232e7');
    if (button) {
        var url = new URL(button.getAttribute('href'), window.location.origin);
        url.searchParams.set('job', '<?php echo esc_js( $job_slug ); ?>');
        url.searchParams.set('position_id', '<?php echo esc_js( $position_id ); ?>');
        button.setAttribute('href', url.toString());
    }
});
</script>
<?php
endif;
?>

Code took site from hard-coded:
/positions-at-heartland/job-application
to
/positions-at-heartland/job-application?job=material-handler&position_id=2575

I also added a data attribute in my template – which i guess worked correctly:
Data attribute: data-job | Value: {{post_slug}}

I *think* this will work – any suggestions are helpful. Always concerned as to whether XYZ php code is safe to use.