Norio wroteGambale's technique basically involves using your fretting fingers to mute the strings next to the one you're playing.
Ya...that will definitely take alot of practice. I have a cd of Gambale where he performs live with Virgil Donati. I got it at one of Donati's clinics here in SA. LOTS of fusion. Our local Ben Badenhorst has alot of that in him + amazing accuracy and speed especially at that age.