I don't know whether Kipling, himself, may have been an active participant in the neo-paganism movement, but I do know that a lot of his poetry is often quoted by neo-pagans. Such as his poem "Song to Mithras".
And then there's his wonderful poem from his Jungle Books, titled "The Law of the Jungle". When the wolves in the poem are viewed as an analogy of pagans (particularly Satanists), then the poem becomes practically a children's primer for Satanic ethics.
Find "The Law of the Jungle" on the 'net, read it, and see for yourself. :)