Graduale Simplex in Spanish
All of the chant pieces on this site are distributed under the Creative Commons License (specifically, the Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License). In short, this license gives you the ability to print as many copies of the chants settings as you need, to print them in your booklets for liturgy, and to sing (pray!) them as you wish, provided the purposes are non-commercial and that proper attribution is indicated. Derivative works are not normally permitted, but if you have a specific project in mind, then please contact us directly.
Odds are that we can! As we try to assemble and publish the chants that we have, we have some flexibility for publishing some things before others. Leave a note in the discussion form specifically for requests, and we might be able to help you out, or at least point you in the right direction.