See Beilage IV - pp 8-11 (second pagination), at the end of Der Krieg des Verbündeten Europa gegen Frankreich in Jahre 1815 by Carl von Plotho. Published by C.F. Amelang, 1818. 612 pages:
http://books.google.com/books?id=t00UAAAAYAAJ
It provides a general listing of available troops in May 1815. The Garde national is given on p 11 by the number of bataillions and military district. Not very detailed.
Steve