I've read it. I like it. Don't worry though, you're in good company by not liking it. A friend of mine who is extremely smart (he's getting a PhD in Economics from MIT this spring) quit when he got to the part about the English candies shaped like hand grenades and mortar rounds. In my opinion, the book is well worth getting through. Others would tell you it's a complete waste of time. I love his novels, they're like little goldmine claims--you have to spend a little time digging for the nuggets, but when you get them you can go get drunk on bathtub gin and buy a bunch of Chinese whores in town. I'm reading his new book, Against the Day, right now. It has given me herpes.
Oh, here's a cool link. This guy did a painting for every page in GR:
http://themodernword.com/pynchon/zak_smith/title.htm