leaky-paywall-gift-custom-fields.php

<?php 

add_action( 'lp_gift_sub_after_billing_fields', 'zeen_gift_giver_address_fields');

function zeen_gift_giver_address_fields() {
    ?>
        <h3>Gift Giver Address</h3>
        <p class="form-row address-field">
            <label>Address <i class="required">*</i></label>
            <input type="text" value="" name="gift_giver_address" placeholder="House number and street name" required="">
        </p>
        <p class="form-row address-field">
            <label>City <i class="required">*</i></label>
            <input type="text" value="" name="gift_giver_city" placeholder="City" required="">
        </p>
        <p class="form-row address-field">
            <label>State <i class="required">*</i></label>
            <input type="text" value="" name="gift_giver_state" placeholder="State" required="">
        </p>
        <p class="form-row address-field">
            <label>Zip <i class="required">*</i></label>
            <input type="text" value="" name="gift_giver_zip" placeholder="Zip" required="">
        </p>

        <p class="form-row address-field">
            <label>Country <i class="required">*</i></label>
            <input type="text" value="" name="gift_giver_country" placeholder="Country" required="">
        </p>
    <?php 
}