G — The seventh letter in the English alphabet. “In Greek, Chaldean, Syriac, Hebrew, Assyrian, Samaritan, Etrurian, Coptic, in the modern Romaic and Gothic, it occupies the third place in the alphabet, while in Cyrillic, Glagolitic, Croat, Russian, Servian and Wallachian, it stands fourth.” As the name of “god” begins with this letter (in Syriac, gad; Swedish, gud: German, gott; English, god; Persian, gada, etc., etc.), there is an occult reason for this which only the students of esoteric philosophy and of the Secret Doctrine, explained esoterically, will understand thoroughly; it refers to the three logoi—the last,the Elohim, and the emanation of the latter, the androgynous Adam Kadmon. All these peoples have derived the name of “god” from their respective traditions, the more or less clear echoes of the esoteric tradition. Spoken and “Silent Speech” (writing) are a “gift of the gods”, say all the national traditions, from the old Aryan Sanskrit-speaking people who claim that their alphabet, the Devanâgari (lit., the language of the devas or gods) was given to them from heaven, down to the Jews, who speak of an alphabet, the parent of the one which has survived, as having been a celestial and mystical symbolism given by the angels to the patriarchs. Hence, every letter had its manifold meaning. A symbol itself of a celestial being and objects, it was in its turn represented on earth by like corresponding objects whose form symbolised the shape of the letter. The present letter, called in Hebrew gimel and symbolised by a long camel’s neck, or rather a serpent erect, is associated with the third sacred divine name, Ghadol or Magnus (great). Its numeral is four, the Tetragrammaton and the sacred Tetraktys; hence its sacredness. With other people it stood for 400 and with a dash over it, for 400,000.
Source: H.P.Blavatsky - The Theosophical Glossary