What is the name of the largest university system in Georgia?

The largest university system in Georgia is known as the University System of Georgia. This system encompasses a network of public higher education institutions throughout the state, including both research universities and smaller colleges, aimed at providing accessible education to a diverse population. It is responsible for coordinating the educational policies and services of its member institutions, which together enroll a significant portion of college students in Georgia.

Other institutions mentioned, such as Georgia State University and the University of Georgia, are notable individual universities; however, they are part of the broader University System of Georgia and do not represent the entirety of higher education in the state. Emory University, while a prominent private research institution, is not part of the University System of Georgia, further emphasizing the distinction. The University System of Georgia plays a crucial role in the state's educational landscape, making it the correct answer in this context.