There are a couple (if not more!!) ways to view someone's gallery. In the gallery section, scroll down past the recent photos and enter 'members galleries' here you will see everyone's personal gallery.
Alternatively, whenever you are looking at someone's photo, you will see a bit below the photo
(see this users gallery) click on this to see their gallery.
Your own gallery can be found by looking on the main gallery page and clicking
My Photos (you can save this as a favourite if you wish)
cheers,
Andy