Make sure that Gravity Forms PDF has a chance to run when Gravity Forms DPS PxPay processes transaction returns and confirmations

gistfile1.php

<?php

/**
* Include the Gravity Forms PDF Extended class if the GFDPSPXPAY plugin is listening to a return URL (IPN-style)
*/
function pdf_init_gfdpspxpay() {
	if (class_exists('GFPDF_Core') && empty($GLOBALS['gfpdf'])) {
		global $gfpdf;
		$gfpdf = new GFPDF_Core();
	}
}

add_action('gfdpspxpay_process_return', 'pdf_init_gfdpspxpay');
add_action('gfdpspxpay_process_confirmation', 'pdf_init_gfdpspxpay');