Hi Davy,
The shaft seal can leak. So it could be either the gasket or the shaft seal. My bet would be the shaft seal as it is the thing that is subject to wear. Also if the gasket was leaking (assuming you use antifreeze) you would see the mark where it was leaking – but you won’t if it is the shaft seal. If your pump has a greaser at the pump end of the shaft, try pumping grease into it and see it that makes a difference.
Water pump leak dripping onto the clutch causes the clutch release bearing to rust and become noisy. Having said that, mine went noisy anyway.
Chris