This game isn't in the GOG catalogue. I remember playing this game back in highschool.
Does anyone know where I could find a copy of this game to buy for PC?

I thought you meant Journeyman the TV show and I wondered why on earth anyone would make a game out of a time traveling journalist.
There's the usual suspects, like but a quick Google search leads me to [url=http://www.pdapreferred.com/journeyman-project-turbo.html?utm_source=google_shopping&utm_medium=google&utm_campaign=product]here. Dunno, looks a little dodgy (as does every site not called Amazon) but look around.

Because thats a brilliant idea for a game, go back in time and write first hand accounts of great moments in history; the evacuation of dunkirk, the wright brothers first flight, that time I got a hat trick in under 12s cricket