What others have said. Including ...
1.) Doug Marman:
"... Paul was bringing to ECKANKAR a freedom from past traditions while incorporating the elements from them that were vital. The concept of spiritual lineage was important, but the restrictions, traditions and worship that go along with physical lineage was not. Therefore, Paul described the spiritual line of ECK Masters, not for its historical accuracy based upon historical records, but to show that as the Sufis say there is always one who is the spiritual Pole of the world, and this light has passed from continent to continent, from race to race, from culture to culture, down through time. ... ."
[Based on:
http://www.littleknownpubs.com/Dialog_Ch_Five.htm (Copyright 2000)]
2.) Ford Johnson:
"[....] Paul's lineage of Eck Masters was indeed mysterious. He was forced to construct a history for himself worthy of the standard he had set. Paul's great misfortune was that he wrote his numerous books at the dawn of the computer age. How could he have known the ease with which information could be checked and challenged, and the truth disseminated to millions at the push of a button? Most religions ... have hundreds if not thousands of years to create and bury the truth of their origins. In time, myth circulates as truth, and there is little opportunity to challenge it. This is not the case for Paul Twitchell and Eckankar. ... ."
[Based on: Confessions of a God Seeker, A Journey to Higher Consciousness, by Ford Johnson, Copyright 2003, p. 110]
Speaking about the Eck Master Dayaka.
"Ramaj was one of the first initiates in the ancient Order of the Vairagi. Before him was Dayaka, who was a great ECK Master in Lemuria. Then there was Kassapa, the living ECK Master who preceded the antediluvian disaster of Atlantis. The line can be traced all the way back to Gakko who came out of the heart of God into this world about six million years ago. The whole line of ECK Masters has descended from him in an unbroken lineage."
[Based on: The Spiritual Notebook, by Paul Twitchell [d. 1971], 10th printing 1983, pp. 196-197]
"Morimitsu tells of ECK Master Dayaka, who shares the tale of Gakko on Venus."
http://www.abebooks.com/9781570430589/Company-Eck-Masters-Real-Life-Experiences-1570430586/plp
"Gakko" was described as a state of consciousness in Paul Twitchell's Eckankar dictionary. However, the Spiritual Notebook mentions a "him".