Some good anniversary gifts to get your girlfriend include a heart shaped drop diamond necklace, a chocolate rose bouquet, or a cute mug with a cartoon character that represents both of you. You can also take her out for a nice lunch/dinner, or get her a cute portrait of the both of you together.
An anniversary present needs to be memorable, personal and special to your relationship. How about make a picture collage or personalized pop art poster print from your photos? I'm sure your girlfriend would love it very much!! http://www.photoartomation.com