glib: GList: do i have to give the first link as an argument?

[barbapapa <barbapapa myrealbox com>]

hi, I'm getting confused with glib.
GList is a double-linked list, from which I infer that,
at least theoretically, It would be possible to give any
link of that list as an argument to represent the list.

now: is that the case, or do the functions that take a GList*
as argument to represent the whole list actually expect me
to give the first list link as an argument?