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The Gregowiki is a central location for all Gregorio users to find:
Gregorio is an open-source project offering software tools for typesetting (engraving) Gregorian chant scores. In particular, Gregorio is an add-on package for the typesetting system LaTeX, so it requires an installation of TeXLive.
Gregorio and LaTeX together produce PDF output suitable for printing.
The input to Gregorio is a notation called GABC, which combines the syllables of a chant text with a simple notation indicating the position and shape of each note.
For most users, it's not necessary to install Gregorio on your own computer. Instead you can access it using one of the on-line Gregorio web interfaces listed below.
There are two web sites that have versions of the Gregorio software installed. They offer interfaces where a user can enter GABC code, make selections about the output format, and receive a PDF file with the score produced by the Gregorio (and LaTeX) software:
Since GABC code assigns notes to syllables of the sung text, these tools can be useful in breaking up a text into syllables:
Ben Bloomfield's on-line tools can apply melodic formulas to hymn texts, psalm verses, and scripture texts:
gprocesswhich is a
perlscript designed to instantly show the result of a gabc file using your system's pdf viewer.
grely.rbwhich converts gabc to simple lilypond. Currently the conversion is possible only to modern notation, with great information loss.
Several published books and smaller works have been produced using Gregorio.