If the GPU card has a DVI-D dual link output, and your cable is a DVI-D dual link cable, and your monitor has a DVI-I dual link input, then it will all work fine other than you will not have any analog input on the monitor which is what the other four pins that are not present on the DVI-D dual link connector but ARE on a DVI-I dual link cable or connector, are for.
DVI-D DL GPU card + DVI-D DL cable + monitor with DVI-I DL input = OK.
DVI-I cable with DVI-D input would not work because the four extra pins on the cable would not have anyplace to plug into. You don't have to worry about this with your setup though.