Add TRY (Turkish Lira) currency to Gravity Forms.

functions.php

/**
 * Add TRY (Turkish Lira) currency to Gravity Forms.
 *
 * @param array $currencies The current currencies registered in Gravity Forms.
 *
 * @return array List of supported currencies.
 */
function add_try_currency( $currencies ) {
	$currencies['TRY'] = array(
		'name'               => 'Turkish Lira',
		'code'               => 'TRY',
		'symbol_left'        => '₺',
		'symbol_right'       => '',
		'symbol_padding'     => ' ',
		'thousand_separator' => ',',
		'decimal_separator'  => '.',
		'decimals'           => 2,
	);

	return $currencies;
}

add_filter( 'gform_currencies', 'add_try_currency' );