Taking electives at Georgetown - Need query to basic question

Hi, I recently enrolled in Graduate School of Arts and Sciences at Georgetown. As much as I love my degree, I am really interested in taking few classes at the School of Foreign Service. My degree is related Technology. What are my chances of getting allowed to take elective course at SFS. Does SFS allow students from other schools to take their couse as elective? And if they do, you think counselors/advisors usually do not make it a big deal? Considering my degree is in Technology.