The compass one is interesting. As we can see, each way of the compass houses a new extra letter and that's probably the main point of this puzzle.
It is known that compasses are marked off to display a full 360 degrees around them. With that logic we can say that:
North is either 0° or 360°
East 90°
South 180°
West 270°
So, if we update the compass image with all of that information, plus the midpoint marks (NE, SE, SW, NW), we can work with something here.
Now, we also have the equation: 450/2=225. The answer, 225, fits between 0 and 360 degrees, so if we think of it as a degree value, we can try and see where it would
point on the calendar:
As you can see it directly points to Southwest. Dead on, with no margins whatsoever. Now let's get back to those extra letters.
The abbreviation of Southwest, our potential answer, is SW but if we use those extra letters that we were given it comes to LS. And what LS stands for? Los Santos.
So, here it is, here's the answer. The server will actually be in Los Santos.