The relationship between the WTS and Gnostic thought is at once both complex and prolix. Insofar as the Gnostics were a summation of several belief systems that proposed salvation through the incremental acceptance of a specialized "gnosis" - knowledge, then yes, we can see a relavance in this relationship. To paraphrase the WT dictum based on John 17:3, the Gnostic idea would be something like: "This means everlasting life, taking in knowledge of us, the only true mystics, and the mysticism we gradually unfold"
However it simply is not possible to explore every ramification of expression that summed up Gnosticism, since it was not a homogeneous system of either religion or philosophy, but embraced many diversified sects holding opinions from a great variety of original sources.There were indeed several theosophies that claimed a Gnostic heritage, many of these predating Christianity. It was, in the formative years of Christianity, as it is today, an amalgam into which a number of different elements have been infused.
For instance, out of the basic Gnostic idea that matter, including the human body, was evil, it soon settled on the notion that the only realm worth exploring was that of the spirit, uncontaminated by base matter and which was good. As a consequence of this, many Gnostics came to believe that since the body was evil, the only course of life to live was that of asceticsm, while others came to exactly the opposite conclusion, that since the body was evil, it made no difference what one did, hence they tended to live what we today would define as loose, immoral lives.
At once a speculative, suble, and elaborate series of theosophic ideas, it endeavoured to introduce into the historic Church, in its infancy, when its theological muscle was still undeveloped, a so-called "higher knowledge" which attempted to displace the centrality of Christ with mystical idealism. Indeed various aspects of Gnostic thought appealed to many of the early church apologists, while at the same time others repelled them.
Probably another aspect of Gnosticism that resembles WT theology was the early Gnostic penchant for allegorizing or extensively spiritualizing the OT and its historicity. A reading of several Wt magazines in which wildly speculative fantasies are spun out - Noah's ark = the Org, for example, captures at least to a provident level, this Gnostic principle. This kind of inferential theology was stretched to levels of total absurdity under the reign of JFR, his book "Enemies" being a prime example.
Recent new finds and the fuller examination of older pieces of literature will, I am certain, along with the possibilty of further finds, expand our understanding of Gnosticism and its influence, not always benign in early Christianity
Cheers