Model United Nations (a.k.a. MUN) is an academic simulation of the United Nations where students play the role of delegates from different countries and attempt to solve real-world issues with the policies and perspectives of their assigned country.  These conferences are usually organised by universities, high schools, non-profit organisations, and other educational groups, such as Rotary Club in Manila.  Once a MUN team has registered for a conference, each student receives a country to represent.  Also, each student on that team will represent that country in a different committee with different topics. 

 
The MUN programme at GESM started in 2016 and usually reach about ten-twelve students.  Every year students are attending events (in October and in February) organised and hosted by the International School Manila, British School Manila, Brent School and Rotary Club of Manila at World Health Organization.