Drupal - Print image field with multiple entries from field in twig template

Print the image field in the node template like any other field:

{{ content.field_gallery_images }}

And then use a field twig to loop through multiple field items:

field--field-gallery-images.html.twig

<div class="row expanded">
  {% for item in items %}
    <div class="gallery-image-item">{{ item.content }}</div>
  {% endfor %}
</div>