Update Gravity Forms currency EUR.

functions.php

<?php

/**
 * Update Gravity Forms currency EUR.
 *
 * @link https://www.pronamic.nl/2012/04/gravity-forms-euro-teken-voor-bedrag/
 * @link https://docs.gravityforms.com/gform_currencies/#1-update-euro
 */
\add_filter(
	'gform_currencies',
	/**
	 * Gravity Forms currencies filter.
	 *
	 * @link https://github.com/wp-premium/gravityforms/blob/2.4.9/currency.php#L116-L146
	 * @param array $currencies Gravity Forms currencies.
	 * @return array
	 */
	function( $currencies ) {
		$currencies['EUR'] = array(
			'name'               => __( 'Euro', 'text-domain' ),
			'symbol_left'        => '€',
			'symbol_right'       => '',
			'symbol_padding'     => ' ',
			'thousand_separator' => '.',
			'decimal_separator'  => ',',
			'decimals'           => 2,
		);

		return $currencies;
	}
);