I have noticed that when performing a sitemap generation Grand Flagallery images (galleries) show up and can be pushed to the sitemap and passed to Search engines. This does not happen with Gmedia Gallery. This would result in Gmedia not having the SEO abilities that Grand Flagallery would have. I have also noticed that if you use both plugins at the same time, Flagallery can be optimized for SEO to push the images to engines. While Gmedia features can be used for customer / visitor presentation. If our site was not currently locked to the public I would send the URL so you can witness this.