The "Trophy" is the latest iteration in a long line of pistols that were the top of the line, purpose built target gun in Colt's line up. Colt recently updated their website and now they list the "Gold Cup Series", which doesn't mention the "Trophy" portion of the gun's name. The Gold Cup Trophy isn't a package, or a special version or anything like that. It is the standard Gold Cup model, and the only Gold Cup model.
Colt first started with the National Match in the 1930's, and produced them up until WWII halted all civilian firearm production. In the 1950's Colt reintroduced the gun, naming it the Gold Cup National Match. They remained relatively unchanged until the Series 70 modifications in 1970, and the Series 80 modifications in 1983. In 1997 Colt dropped the National Match portion of the name and changed it to Gold Cup Trophy, which is the one you see on dealer shelves today.