Código HTML Galería Google Drive

<div class="gallery-container">
  <div class="gallery-grid" id="gallery"></div>
</div>

<div class="modal-gallery" id="imageModal-gallery">
  <span class="close-btn" id="closeModal-gallery"></span>
  <div class="modal-content">
    <img src="" alt="" class="modal-image" id="modalImage-gallery">
    <button class="nav-btn prev-btn" id="prevBtn-gallery"></button>
    <button class="nav-btn next-btn" id="nextBtn-gallery"></button>
  </div>
</div>