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<?php
/**
 * Gravity Perks // Populate Anything // Populate User Role
 * http://gravitywiz.com/documentation/gravity-forms-populate-anything/
 */
add_filter( 'gppa_process_template', function( $value, $field, $template, $populate, $object, $object_type, $objects ) {
	if( $template == 'role' && is_a( $object, 'WP_User' ) ) {
		$value = implode( ', ', $object->roles );
	}
	return $value;
}, 10, 7 );