I’m not sure what you’re trying to do. My understanding is that you have the gabc needed to generate scores, which are all in one document right now, and the staves for one score are close to the other.

You have there a bunch of things that you would save to your computer as a separate file with the extension .gabc to be used with Gregorio.

Those are also used individually by Illuminare/Source and Summit and the web editor for Gregorio run by our very own @chonak.

You can put all of the gabc in one file with one header (the name header is necessary, but the visual editors and the website run by Ben Bloomfield sometimes use outdated headers).

The way to create scores with custom spacing between scores is to run LaTeX yourself. In your .tex document, you can run \gregorioscore for each of your Alleluias, each in its own .gabc file, and from there you can insert space if you’re not happy with the default spacing. That is the best way to do things. (You’ll create a bunch of problems if you have one .gabc file: you can change clefs, but then you’ll have issues trying to insert space between the staves, so don’t do this).

You can’t really tweak anything with the online visual editors other than the features for which there is something to touch (the typeface, the initial size, the vowel centering, etc.)

Yeah, that's the other thing, but it doesn't work so well with the visual web editors, since you can't suppress the custos (the whole point of the description language is that it's format-independent, it just has to be supported by your chosen format, but you have to keep up with the newer features, and nobody has…).

and the space between the staves is what it is.

No, it’s not possible to change modes with one .gabc file, since either the annotation or mode line above the %% (as is the case for the web editors like Illuminare/Source and Summit or if you use LaTeX and don’t change anything) or the annotation in your LaTeX document give the mode. But you can’t change it mid-file to have a new score.

Yeah, there are lots of ways to slice and dice it.

although that is not a great idea.

You’re missing hyphens in half of the examples. The space between the last letter and the opening parenthesis or tag in this case (and then the closing tag followed by the opening parenthesis) causes Gregorio to treat it as a new word, albeit inconsistently for some reason.

You need to remove the extra spaces; conversely, the notes in parentheses for a syllable followed by parentheses with the punctuation mark used for any kind of bar line are followed by a space, lest a hyphen be inserted.

Anyway, the GUI is sort of ruined by using multiple files at once, and Illuminare (the OG version) apparently does run a limited form of LaTeX on the gabc file, but it doesn’t know to hide the tags, and neither it nor the Alpha version of the Source and Summit editor support later additions to GABC, the description language (not the file extension of the same name) made after Gregorio 3.0.