Uppercase Entry Value (by Field)
Code
Filename: gw-uppercase-entry-value.php
<?php
/**
* Gravity Wiz // Gravity Forms // Uppercase Entry Value (by Field)
* https://gravitywiz.com/
*/
// Update "123" to your form ID and "4" to your field ID.
add_filter( 'gform_get_input_value_123_4', function( $value ) {
return strtoupper( $value );
} );