Gatorskins are horrible IMO. Poor grip, average puncture resistance, slow, vague, just plain nasty. They’re the worst kind of winter tyre offering neither good grip and feel or any noticeable puncture resistance.
GP4’s are generally better in every part bar puncture resistance and, for what I use are a better tyre.
However, and I say this as someone who’s yet to find a Conti tyre he likes, there are better options out there.
Vittoria Open Pave are fast, grippy and my favourite winter tyre.
Vredestein Senso Xtreme are damn fine too, a bit tougher and heavier but very good in the wet.
And Schwalbe Marathon are for when you care not about weight or feel and only about not getting punctures.