I agree with TJ - big points for remembering.
If you want to give a gift - something small, but meaningful and thoughtful. A nice card and a single rose are very romantic. I'm not sure what other gift suggestions to offer since I know nothing about your girlfriend.
As for the date, a nice dinner at a quiet restaurant or better yet...cook dinner for her. If you are not much of a cook yet, I'm sure your parents would give you a hand if you asked nicely. A movie is nice, but another idea, since it is summer, is to look for local outside music or theatre events in your area. If you can find one, many times you can pack a picnic dinner and spend some time together under the stars enjoying some music or a play at a relatively low cost. It's also just something different and new to try.
If you let me know where you are from, I'm happy to help you look around for some other ideas.
Nikki
