Do you want to change the order of the Gravity Forms Address field items? Especially to put the ZIP-code before the City (as is usual in Germany and the Netherlands for example)? Here you find the easiest way.
Zip-code before City in Gravity Forms (order of address field)
How to change the ZIP-code field location in your Gravity Form
Copy this code in your functions.php in your theme directory and the zip-code will show before the City instead of after it.
add_filter( 'gform_address_display_format', 'address_format' );
function address_format( $format ) {
return 'zip_before_city';
}