Yes, but.......
Gnosticism, the basis of the New Age Movement, is actually referred to in the Bible. We are warned to stay away from such things. (Ephesus was one of the hot beds of Gnosticism, which spread to Galatia, also in Asia Minor)
"O Timothy, guard the deposit entrusted to you. Avoid the irreverent babble and contradictions of what is falsely called “knowledge,” for by professing it some have swerved from the faith. Grace be with you." 1 Tim. 6:20-21
"I am astonished that you are so quickly deserting him who called you in the grace of Christ and are turning to a different gospel—7 not that there is another one, but there are some who trouble you and want to distort the gospel of Christ.8 But even if we or an angel from heaven should preach to you a gospel contrary to the one we preached to you, let him be accursed.9 As we have said before, so now I say again: If anyone is preaching to you a gospel contrary to the one you received, let him be accursed." Gal 1:6-9
Those Scriptures are not necessarily specific to Greek Gnosticism. It was later when the early Church had to contend with the Gnostic movement in the 1st and 2nd century A.D. Irenaeus in his
Against Heresies should be required reading on it.
Gnosticism involved a mix of pagan Greek philosophy with the early doctrines of Christianity. To this day many of the secret societies evolved from the ancient pagan "mystery schools" still teach Gnostic doctrine against Christ Jesus.
Just recently, a newly discovered papyrus fragment speaking of Jesus' wife was declared authentic by some Harvard nut, which is a sign of Gnostic influence, which in that case is only another denial of many of the Divinity of Jesus Christ as God The Son.
The Gnostics did not believe Jesus actually died on the cross, but instead that His disciples removed His body from the cross before He died, and that Jesus lived to old age, married, and had children. The pseudo book
The Da Vinci Code was specifically about the continued existence of a literal blood lline from Jesus' loins, which of course is false. These fakes even treat the supernatural powers Jesus had as something that's passed on from generation to generation through His genes, that is how wrapped up in pagan superstition those Gnostics are. It's the same old ploy by Satan, trying to get you to deny that God came in the flesh as Jesus Christ incarnate via The Holy Spirit.
Why do they want you to reject that God came in the flesh as Jesus Christ? Because it affects your salvation of course, but what else? So you can be fooled into believing you can become your own... god, that you can save yourself. This is what the Gnostic 'knowledge' is rooted upon. The name Gnostic comes from the Greek word
gnosis, which means 'to know', like firsthand experience. Their method of salvation they preach is through spiritual exercises that supposedly awakens their inner spirit to manifest powers in nature that all men in ancients times used to have (i.e., priests of Atlantis thing).
Thus their salvation idea is based on a DIY method, like scientific process almost. The heart of this idea began in ancient Sumer/Babylon, ancient India and China, ancient Egypt and Greece. The schools that taught these secrets would only teach them to the initiated, and to get in, you had to be accepted as a neophyte on probation before being allowed to start a study of the "mysteries" (which is still how secret societies today operate).
So in essence, Gnosticism is actually the same old pagan philosophy of the ancient "mystery schools" seeking to slide into Christianity and modify The Gospel of Jesus Christ.
Here's an example of how Gnosticism tries to usurp principles of Christianity:
Once accepted as a neophyte and put on probation, you'd be told the reason why you sought these ancients out to join is because you knew there was more, and had questions no one could yet answer, which shows that you are
Jesus' true elect. They love to play that idea of election upon you a lot. Only that you can do what Jesus did (our Lord Jesus say something on that order, but not how the Gnostics mean it). In reality, we can do nothing of ourselves.
Their point is that through your own works and thru spiritual exercises, your spirit can become literally perfect in the flesh and you become 'enlightened', 'illuminated'. That's why they treat our Lord Jesus, Buddha, Krishna, Mohammed, Zoroaster, etc., as all equals, as avatars sent every 2,000 years or so to the people on earth to evolve their spiritual learning.
In 17th century British Mason John Robison's book Proofs Of A Conspiracy, he mentioned a letter written by Adam Weishaupt, the founder of the Bavarian Illuminati, of how he had duped a certain Christian divine with his initiate degree on Christianity. Weishaupt said he didn't know that he would be the founder of a new religion (i.e., tainted form of Christianity, such as like Gnosticism).
One must needs ask, what's a high Christian Church leader doing on the membership roles of such an organization like Weishaupt's Illuminati order in 1770's Bavaria? It's because of how these pagans devise sneaky ways to appeal to the innocent who are looking for more knowledge than what God has given them.
They work how Satan worked in Luke 4 with tempting our Lord Jesus to jump down with quoting a Scripture in the Psalms showing Jesus would not be harmed. Satan added one short phrase to the original Scripture which changed its meaning. So if you didn't know what that Scripture originally said, then you might fall for Satan's modification of it. Our Lord Jesus instead of course rebuked Satan for it.