function after_submission( $entry, $form ) {

    wp_fusion()->crm->object_type = 5; // ID of your custom object type

    $object_data = array(
        'email'     => rgar( $entry, '1' ), // Standard field
        'f1500'     => rgar( $entry, '2' ) // Custom field
    );

    $object_id = wp_fusion()->crm->add_contact( $object_data, false );

}

add_action( 'gform_after_submission_1', 'after_submission', 10, 2 );