New to gfortran

[RadSurfer]

I thought I would have some fun learning where Fortran has gotten to these days.
I already have reasonable experience with C, some C++, and Delphi, Lazarus.

The wish to obtain the following I have not yet been able to find:

PDF's outlining all of the available gfortran
   1) language reference and 
   2) extensions 

for example something that actually contains iargc, and getargs, etc., and
something that might contain how to get file and especially directory information
from inside a Fortran application which I can compile under gfortran.

   3) places where I might find sample gfortran source which I can study
and learn from (especially if they let me do whats described above).

I happen to really like PDF references since I can easily use the same identical
file on both Win32 and Linux.

I can be reached at RadSurfer@yahoo.com,
I also have gaim under a different handle.

Any help appreciated...

//Rich//