Founded in January 2001 by Gabriel Guerra Castellanos, GC&A is a specialized consulting firm that offers strategic communication, lobbying, as well as government and community relations. In just a few years, Guerra Castellanos & Asociados have become one of the most important firms of its kind in Mexica. Our strength is the reputation for efficiency and professionalism that we have earned among our clients. GC&A offers customized services and pays particular attention to timely delivery. Each client receives personalized attention from partners and associates and is supported by a team of highly-qualified specialists and account executives