Orange is the second flavor to be produced by Robert Cade and Stokely-Van Camp, Inc. It was made around the time Lemon-Lime got its reformulation, to make it more palatable for consumer use.[1]
Alike to Lemon-Lime, is one of the more common flavors of Gatorade, being available in any store that carries Gatorade. A G2 and ZERO variant of this flavor exist. However, the G2 variant has been made hard to find in recent years, possibly hinting that it has been discontinued.