gnus-predefined-server-alist

gnus-predefined-server-alist is a variable defined in `gnus.el'.
Its value is

(("cache" nnspool "cache"
  (nnspool-spool-directory "~/News/cache/")
  (nnspool-nov-directory "~/News/cache/")
  (nnspool-active-file "~/News/cache/active")))

Documentation:
List of predefined (convenience) servers.