Prepopulate Gravity Forms field with Paid Memberships Pro Membership Level ID.

gravity-forms-pre-populate-membership-level-pmpro.php

<?php

/**
 * Example on how to auto-populate a Gravity Form Field "membership_level" with the user's current membership level for Paid Memberships Pro. 
 * If user is not logged-in or doesn't have a membership level leave it blank.
 * Adjust the 'gform_field_value_membership_level' name to match that of your field name parameter name.
 */
function my_auto_populate_gforms_pmpro_level( $value ) {

	if ( ! defined( 'PMPRO_VERSION' ) || ! is_user_logged_in() ) {
		return;
	}

	global $current_user;
	$level = pmpro_getMembershipLevelForUser( $current_user->ID );
  
	if ( ! empty( $level ) ) {
		$r = $level->ID;
	} else {
		$r = '';
	}
  
	return $r;
}
add_filter( 'gform_field_value_membership_level', 'my_auto_populate_gforms_pmpro_level' );