The GNX was a very fast car for its time.  I remain amazed at how fast family cars can be today, I never expected that to happen.  I had VERY slow vehicles from 1982 to 1997 trying to save some gas (which also had gotten very cheap, unexpectedly).  Then I bought a V6 minivan that seemed fast, to me.  Then I got a 2005 CTS that was quasi-fast, much faster than anything I'd had before, ever.