hmmm....
I don't know. The first thing you might do is try to check out the differences in your shifter, and the other aftermarket shifters that are available for the GTO. Does the WS6 have the same trans.? You can see the B&M aftermarket sport shifters on several sites, they all use the same pix, so it doesn't matter where you go.I'm not familiar w the WS6, and so I don't know specifically a yes or no answer.
PM sent.
Maximental