This is actually a really cool idea... one I've tested before, in fact!
The only problem is, GF is very risky to use, like Tri said. You need something bulky and heavy for it to work well, like MF-H Killerken Dragooon BD145GF.
That said, this is super close to absolutely amazing, but you'd want to use something besides SA165, like BD145 or CH120.
Come to think of it, Dragooon BD145GF balance customs haven't been considered much for potential addition to the tier list. They're amazing spin-equalizers, and they do have decent resistance to Attack. The only thing you really need to worry about when using a BD145GF spin stealer is
1) not actually being able to steal spin effectively near the end of the match, due to all the friction GF is creating (had this happen to me on more than one occasion, especially against aggressive opponents ), and
2) Self-KO. Even weak-launching (which will oftentimes lead to the first defect I mentioned) with such an incredibly aggressive Bottom is still quite risky.
If you can get past those two things, they're really quite effective.