libgssapi-0.2.2 has been yanked.
Visit the last successful build:
libgssapi-0.9.1
The abstract model of gssapi is client/server, there is always the
idea of a client that is going to create a context with some
server. The process of creating the context will mutually
authenticate the client and the server to each other, and they can
then use it to exchange encrypted, and/or integrity checked
messages for some period of time while the context is valid. So if
you're lost start in the context module.