George Winston is
not, I repeat,
not a "
New Age"
musician (whatever that means). He himself insists on this.
He can, however, be described as a minimalist (examples of minimalists would be Steve Reich, Philip Glass, or John Adams (no, not the second President of the United States). He is one of the few minimalists who has popular appeal.
While on the topic of minimalism, a famous joke about George Winston runs thus:
First Guy: Where can I get scores for George Winston's music?
Second Guy: At a wallpaper store!
His early albums were the most innovative but he has become kind of stagnate now.