The Liturgy of Saint Gregory the Theologian (or Anaphora of Saint Gregory, Coptic: Ϯⲁ̀ⲛⲁⲫⲟⲣⲁ ⲛ̀ⲧⲉ ⲡⲓⲁ̀ⲅⲓⲟⲥ Ⲅⲣⲉⲅⲟⲣⲓⲟⲥ, romanized: Ti-anaphora ente pi-agios Gregorios) is one of the three Anaphoras retained by the Coptic Church.
[1] The text is named after Saint Gregory of Nazianzus, one of the Cappadocian Fathers.
This text doesn't cover the whole Divine Liturgy, but it extends only from the pre-anaphorical rites to the Fraction, so including the anaphora in the strict sense of the word.
[1] The text however was adapted to the Egyptian use, and it was one of the three anaphoras which use was permitted by the canons of Patriarch Gabriel II in the 12th century.
The Anaphora of Saint Gregory the Theologian follows the Antiochene (or "West Syriac") structure, which can be so summarized: