If you're promoting a gallery, you're sorta limited as far as what you can do to promote it. Mostly, you're looking at submitting to many, many TGP's. Most will require a recip link, so you'll have to save different copies of the page, put a few recips on it & then submit that page to the TGP's you habve listed. Do this over & over & over....
You can submit the page to SE's but it's better if the SE's find you from what I'm told.
BTW - that page will looks very bad unless the surfer is set at 1024 wide
