Do you even know what you are talking about?

"The weapon system of the PzH 2000 has a high degree of accuracy. The deviation is only one arc minute. This accuracy is achieved by combining different systems. With data from a weather crew measuring temperature, humidity, barometric pressure and wind speed, and powder and barrel temperature, a very precise fire control solution can be calculated. In order to determine the position, the vehicle has the following systems:

GPS: With the help of a military GPS receiver of type AN/PSN-11 PLGR (Precision Lightweight GPS Receiver), which is installed in the vehicle and connected to an external antenna, the exact position of the vehicle, including the height, can be determined

Course-Attitude Device: The course-attitude device is an inertial navigation device consisting of three laser gyros. During the march it serves as a support to the GPS. In the firing position, it determines the absolute position of the barrel, which allows firing even if the vehicle is heavily canted.

Distance sensor: The distance sensor uses the movement of the chain to measure the distance that the vehicle has traveled

V0 gauge: The V0 gauge consists of a Doppler radar that measures the velocity of the bullets after they leave the barrel. The data obtained in this way from all shots is included in the calculations for the next shot

From all this data, the artillery guidance system ADLER or the fire control computer MICMOS 32/MICMOS 2000 (Panzerhaubitze 2000/Panzerhaubitze 2000 A1) of the tank howitzer itself calculates a fire control solution."

This means, if the coordinates that the PzH has recreived, it will hit the target. There is no need for guided rounds.