from the Hinduism Today website (6 schools of Saivism).:
Gorakshanatha, in Viveka Martanda, gives his view of
samadhi: "Samadhi is the name of that state of phenomenal
consciousness, in which there is the perfect realization of the
absolute unity of the individual soul and the Universal Soul, and in
which there is the perfect dissolution of all the mental processes.
Just as a perfect union of salt and water is achieved through the
process of yoga, so when the mind or the phenomenal consciousness is
absolutely unified or identified with the soul through the process of
the deepest concentration, this is called the state of samadhi. When
the individuality of the individual soul is absolutely merged in the
self-luminous transcendent unity of the Absolute Spirit (Siva), and
the phenomenal consciousness also is wholly dissolved in the Eternal,
Infinite, Transcendent Consciousness, then perfect samarasattva (the
essential unity of all existences) is realized, and this is called
samadhi." Having achieved samarasattva (or samarasa), the yogi
remains continually aware of the transcendent unity of God, even
while being aware of the ordinary material world. This is the supreme
achievement of the system. The school is noted for its concept of
kaya siddhi, extreme physical longevity, and even the claim of
immortality for some. Indeed, Gorakshanatha himself and many of his
followers are considered to be alive today, carrying on their work
from hidden places. The precise methods of this are not delineated in
their texts, but are taught directly by the guru.
