I was looking at Warn's web site and found premium manual hubs for a 89 to 00 Geo Tracker and 89-01 Suzuki Grand Vitara, Vitara, and Escudo they both appear to have the same part number.  From what I know about the platform the body style changed in 99.  Is there anything that would prevent these hubs from fitting my 02 Tracker.  Also their web site states their not compatible with the central axle disconnect system

LowRange lists them for the 99-04's

Same thing.
I took the oem ones off a side kick and have them on my 01 GV.

You can replace the drive flanges on a 99-05 with the freewhell units from a 89-98.

I think that "not compatible" note is just referring to the fact that the pnuematic clutch in the front axle is still required to function to transmit power to the front wheels (unless it is disabled in the clutched-in position by zip-ties or w.h.y.).

I think your assumption is correct, Ian!

I am seeing the same thing, some sites list parts for my 01 Tracker but some sites cut off the Tracker at 00.  My 01 Tracker looks like the 01 GV, I realize they changed the sheet metal and may have carried over some suspension or drivetrain products.  I understand my Tracker was made in Canada, where was the 01 GV made?  Does anyone know more about this?

According to the Suzuki Parts Catalog, there are two main production groups:

99-03 and 04-05

There are some changes of individual parts within those groups, but the only way to know if there is a difference between 00 and 01 is to look up the specific part, which I can do if you list the parts you are interested in.

The catalog lists where there are differences for vehicles made in Japan/Canada.

Afaik, there are no differences between equivalent GM and Suzuki badged vehicles, except trim. 

If you want to know where yours is made, check the VIN.