Joe,

It looks like your corrected words have not made in into the DT yet, nor has a tune.

Of the three tunes in this thread, Alison's is the closest to Steeleye Span, because they use the first verse (sung twice) as a chorus:

CHORUS
Gaudete, gaudete! Christus est natus
Ex Maria virgine: Gaudete!
Gaudete, gaudete! Christus est natus
Ex Maria virgine: Gaudete!

Tempus adest gratiae, hoc quod optabamus
Carmina laetitiae devote redamus.

Gaudete, etc

BTW - on the recording I have, they sing it in C minor, not A minor. Here's an ABC in that key.

X: 132
T:Gaudete
M:4/4
L:1/4
Q:100
S:Steeleye Span
N:filename [GAUDET
K:Cm
|:c2 c2|B2 cd|
M:3/4
e2e|d2c|
M:4/4
B2 B2|B2 c2|d3 c|
M:3/4
B2 c|d2 c|
M:4/4
B2 c2:|
cc Bc|ed c2|cA GA|F2 F2|
FFAF|AB c2|ec de|c2 c2||

Wassail! V