Change Element's Name Attribute in Gravity Forms
It isn't the most beutiful code, and I'm not sure if there is a gravity forms approved way (it wasn't apparent to me), but something like this should work for you.
<script type="text/javascript"> jQuery(document).ready(function() { jQuery('#input_1').attr('name','YOURCUSTOMNAMEVALU'); });</script>Also, for WordPress you should probably wrap it in a scope to contain this to the page that contains your form.
Something like
<?phpif(is_page('forms-page') && !is_admin()) {?>//Javascript Here<?php } ?>For style points you can use enqueue_script to include it from your functions.php
Set the parameter name to something like 'customparam'.
Then dynamically populate it using a filter.
add_filter('gform_field_value_customparam', 'populate_customparam');function populate_customparam($value){ return 'Hello';}This will dynamically insert 'Hello' into every gravity form field with parameter named 'customparam'