Unfortunately, the Gelfand Correspondence Program in Mathematics has suspended operations. It is no longer accepting students.
The books prepared for the program remain available. These books are described at http://gcpm.rutgers.edu/books.html.
You may see a description of the program as it existed from 1990 until its suspension at http://gcpm.rutgers.edu/former_description.html.
If you have questions, please contact Robert Wilson by e-mail. His address is rwilson at math.rutgers.edu.