Hello Syahir,
I don’t know if this is a Bug or a missing feature, but when you are browsing in to a gallery (post Image-attachments) In most of the themes you have a small link or a button that helps you to navigate across the images. In Graphene mobile you have none, for example If you browse this image in desktop mode (using the default WP theme) http://bit.ly/rrvQcl you can see at the bottom of the image the navigation links, Nonetheless If you browse using the graphene mobile version you only get the image and a link to go back to the gallery http://bit.ly/oGn3Jr.
BTW it looks beautiful the way that the mobile version displays a gallery:
http://bit.ly/qjhDGV it just need a better way to include the captions.