Marshall System is a trademark of
Joaquín M. Casals-de-Nadal
With the collaboration of a number of GDS users who have given opinions, criticisms and suggestions for improvement we have developed over 200 versions and revisions of GDS since 1988.
To contact us, please send an e-mail to the address below. We will always try to reply as soon as possible. You can use this web to send a comment as well.
If you need support please go to the support page of this website, where we express the most appropriate way to proceed with the best productivity.
MARSHALL SYSTEM II, S.C.P.
Tax Code: J65315301 (Spain)
c/ San Elías, 34, 5º 2ª
08006 - Barcelona - (Spain)