How to pass short codes to Gravity Forms email WordPress

I have tried to create short code and use while sending an email from Gravity Forms notification after submission.

HTML in notification

<a href="[site_url]">

But it sends the short code string not value.

I tried this code:

add_action('init', 'wpdocs_add_custom_shortcode');
function wpdocs_add_custom_shortcode()
{
    add_shortcode('site_url', get_site_url());
}

Please help me to get fix this.

In default Gravity Forms or any other plugin depends support on custom shortcodes. To set the some value to the gravity form without creating a custom shortcode, consider using the gform_replace_merge_tags filter hook to create a custom shortcodes.

Try below snippet

<?php
add_filter('gform_replace_merge_tags', 'GF_create_custom_shortcodes', 10, 7);
function GF_create_custom_shortcodes($text, $form, $entry, $url_encode, $esc_html, $nl2br, $format)
{
    $custom_merge_tags = array(
        '{site_url}'  => get_site_url(),
    );
    return str_replace(array_keys($custom_merge_tags), array_values($custom_merge_tags), $text);
}

In other words it will work only for "Gravity Forms" at any place or in any relative hooks / filters created by it.

Also it will work at the time you using it in Email Notification.