For sending the copy of the gift card template you can use the following code in functions.php in your theme.
add_action('wps_wgm_send_mail_to_others','wps_wgm_send_email',10,3);
function wps_wgm_send_email( $send_subject, $message, $attachments ) {
$headers = array( 'Content-Type: text/html; charset=UTF-8' );
wc_mail( $recipient_email_id, $send_subject, $message, $headers, $attachments );
}