Gravity Form Example (after submission)
<?php
add_action( 'gform_after_submission_35', 'mizner_test_function_user_meta', 10, 2 );
function mizner_test_function_user_meta( $entry, $form ) {
$user_id = get_current_user_id();
$company_name = $entry['5'];
$description = $entry['2'];
update_user_meta( $user_id, 'user_facebook', $company_name );
}