This Requiem in D minor, Op.20, for choir and organ.

This Zweites requiem in C minor, Op.21, is for SATB choir and organ.

Third Requiem in D flat, Op.37, for mixed choir, two horns and organ.

This Missa pro defunctis Op.71.

This Missa pro defunctis in E flat minor, Op.80, for four voices, choir and organ. It contains:
- Introitus: Requiem aeternam
- Kyrie
- Graduale: Requiem aeternam
- Tractus: Absolve Domine
- Offertorium: Domine Jesu Christe
- Sanctus
- Benedictus
- Agnus Dei
- Communio: Lux aeterna

Requiem in A, Op.84, for Chorus SATB, Soli SATB, 2 Vln, Vla, VCl, Violone, 2 Clarinetti, 2 Corni, Trombone, Organo.

Gruber wrote at least three requiems, one of them is not the traditional mass, but a so-called German Requiem, Op.114.

This Requiem in D minor, Op.145 (ca.1905) for one or two voices and organ/hatmonium, or: SAB choir organ, strings and two French Horns.

Missa pro defunctis, Op.179 (1910) for three part choir and organ.

This Requiem und Libera, Op.206 (1910), for four part male choir.

Missa pro defunctis with Libera me, Op.219 (1911), for one or two voices and organ / harmonium.

This Requiem in B major, Op.299.

This Requiem in E flat major, Op.201 (ca.1920), for four voices, strings, two French Horns and organ.