Guinsa can only be covered on foot, and it's quite a hike uphill from the bus terminal to the top. The area is large and it's best to arrive early and reserve at least a few hours for exploring the complex.
Signage or other information in English is basically non-existent, but there's a handy map displayed just prior to the first gate and reproduced here, the numbers in the listings below refer to this. The Cheontae site also has an interactive map (http://www.cheontae.org/0...), but in Korean only.