Separate ground and track fuse
GND is a generic term that can refer to many different things. Simply put, it is a common point.
A track fuse is a fuse made from a pcb track. For all intents and purposes it is a fuse.
AGND is analog ground - this is usually a low current path that does not have significant current flowing as compared with PGND which is the power ground. This is the high current return path. Due to resistance and current, you can expect a voltage drop. This means you need to consider this when you tie AGND to it.