He also seems to have been involved with the leaders of both factions of the occult community in London at the time: Arthur Edward Waite of the magical order, the Golden Dawn, and Aleister Crowley, who created his own order, A∴A∴, after he left the Golden Dawn. On 10 January 1906, Gunn was inducted into Waite's "Independent and Rectified Rite". R. A. Gilbert's biography of Waite describes Gunn as "an artist, an Egyptologist and an oriental linguist", and says that, in 1910, he "argued at great length over the correct transliteration of Hebrew terms used in the Grade rituals." Crowley based his new religion, Thelema, on the translation of the Stele of Ankh-ef-en-Khonsu, also referred to as the "Stele of Revealing". He originally (1904) had it translated by the assistant curator of the Boulaq Museum in Cairo, under the supervision of the Egyptologist Émile Brugsch. In 1912, he arranged for another translation, by Gunn and Gardiner.