Change gravity form default state names to abbreviations

gform-state-abbriv.php

<?php
/**
 * Replace default state names with abbreviations
 * 
 * @author Joshua David Nelson, josh@joshuadnelson.com
 */
add_filter('gform_address_types', 'jdn_gform_address_types', 10, 2);
function us_address($address_types, $form_id){
	$address_types['us'] = array(
		'label' => 'United States',
		'country' => 'USA',
		'zip_label' => 'Zip Code',
		'state_label' => 'State',
		'states' => array(
			'' => '',
			'AL' => 'AL',
			'AK' => 'AK',
			'AZ' => 'AZ',
			'AR' => 'AR',
			'CA' => 'CA',
			'CO' => 'CO',
			'CT' => 'CT',
			'DE' => 'DE',
			'DC' => 'DC',
			'FL' => 'FL',
			'GA' => 'GA',
			'GU' => 'GU',
			'HI' => 'HI',
			'ID' => 'ID',
			'IL' => 'IL',
			'IN' => 'IN',
			'IA' => 'IA',
			'KS' => 'KS',
			'KY' => 'KY',
			'LA' => 'LA',
			'ME' => 'ME',
			'MD' => 'MD',
			'MA' => 'MA',
			'MI' => 'MI',
			'MN' => 'MN',
			'MS' => 'MS',
			'MO' => 'MO',
			'MT' => 'MT',
			'NE' => 'NE',
			'NV' => 'NV',
			'NH' => 'NH',
			'NJ' => 'NJ',
			'NM' => 'NM',
			'NY' => 'NY',
			'NC' => 'NC',
			'ND' => 'ND',
			'OH' => 'OH',
			'OK' => 'OK',
			'OR' => 'OR',
			'PA' => 'PA',
			'PR' => 'PR',
			'RI' => 'RI',
			'SC' => 'SC',
			'SD' => 'SD',
			'TN' => 'TN',
			'TX' => 'TX',
			'UT' => 'UT',
			'VT' => 'VT',
			'VA' => 'VA',
			'WA' => 'WA',
			'WV' => 'WV',
			'WI' => 'WI',
			'WY' => 'WY'
		)
	);
	return $address_types;
}