Not an amazing score, but passing! In reality I didn't study all that much. Went through some of the material that WGU provided, became familiar with the the 27001, 27002, 27003, and took both practice tests that Sans provided.
The test is open book and I used all three of those standards a lot during the test! A lot of the questions you can answer with general IT knowledge from experience in the field.
Big thanks to Agent47 and his detailed preparation guide which is located here:
http://www.techexams.net/forums/sans-institute-giac-certifications/88987-passed-giac-g2700-exam-today.html It helped me a ton!