I guess I don't know what you mean by "a mass". Do you mean a set of propers? Yes. A set of ordinaries? Kind of. Gaudeamus omnes is, indeed, the appointed Introit for the Mass. The propers are thus:
Introit:Gaudeamus omnes Gradual & Alleluia:Timete Dominum Offertory:Justorum animæ Communion: Beati mundo corde
When someone asks about a specific Mass, I usually assume they are talking about which musical setting of the Mass Ordinary. I believe Heitor is asking which chant Mass Ordinary is recommended for All Saints.
My answer: I don't know. I can't seem to find the chart that has the recommended Mass Ordinaries for the liturgical year anywhere. They're recommendations, though, not obligations.
To participate in the discussions on Catholic church music, sign in or register as a forum member, The forum is a project of the Church Music Association of America.