Sort of. His theory was that by using a certain brand of quantum mathematics on General relativity he got out recognisable quantum expressions. Of course that is a bit obvious since he started with quantum mathematics, so he is now in the process of trying to prove the quantum mathematics purely within General relativity.

Basically his theory is trying to find a mathematical representation of the topology distorted space-time which we see as particles and quantum effects. The main difference between this and string theory is that it includes microscopic scale time travel and that gravity is not a quantum force like the others and instead is completely continuous.