Gnosis is the sector (from the early Christian era) which sought to make a synthesis of Christianity with Jewish teachings and pagan philosophy, gnosticism,-ation - the gnostic teachings. The word "Gnosis" spasm. gnosis, gnóseos, which means understanding, knowledge, reasoning, mood.
Gnosticism is the teaching based on Gnosis, the transcendent knowledge that comes from within, in an intuitive way. While Gnosticism is based on personal experience, the error is to assume that all such experience results in Gnostic knowledge. Closer to the truth to say that Gnosticism expresses a certain religious experience, which does not reveal the theology or philosophy, but are close to the expression in the form of bribes. Indeed Gnostic writings are a form of bribery.