There are two ways to schedule GUE classes -- one is to contact an instructor, and find out if he is running a class you can get to that has an opening for students. (Not all, or, I sometimes suspect, even most classes are posted on the GUE website). The other way is to gather several people who want to do a class, and contact an instructor about coming in to teach it. As mentioned, you have two GUE instructors in the general area, although neither is actually in the Philippines.