If you have a DET block, you have an oil feed provision on the right side of the block (the side that faces the radiator) and I don't think the GFD line is really designed for this. It could work I bet, but you'll have to get creative. There's not way you're going to want to use all 4 feet of it.
Unless you block off the oil feed provision on the right side of the engine and use the oil feed line as it was intended. The DE guys use it to bring oil from the left side of the engine. The feed line is hooked into where the stock oil pressure sensor goes. The sensor is relocated or replaced by a better unit and gauge, or taken out completely.
As I suspected, you didn't get an oil drain from the GFD, so you're going to have to do something about that. You might have the stock one you can re-use.
As for the water lines. Like TheRealNighthog said, for the water it doesn't matter which way it flows. You have a DET block so you'll have water provisions for the turbo as well you can reuse, or block them off and do what most DE guys do and source water from the throttle body coolant channel.