The difference between the GT 2000 and the GT 2000L is twofold:
1) The GT 2000 used the same black veneer that is used on the NS 1000 speaker. The GT 2000L uses a walnut(?) veneer.
2) the GT 2000 is a fully manual turntable which can be fitted with the optional arm-lifter which lifts the arm at the end of the record side. The GT 2000L comes fitted with the optional arm lifter as stock standard.
Other than those two differences, the shade of the veneer and whether the arm lifted is an option or fitted as stock, there is absolutely no difference between the two models. They are fundamentally, essentially exactly the same identical turntable. All accessories which fit the one, fit the other. The plinth, motors, motor control electronics, platter and arms(with exception to the arm lifter) are exactly the same with no difference at all. Twins wearing different make-up.
The optional arm lifter can be fitted to the GT 2000, so in essence the biggest difference is the veneer. Identical twins with different make-up.