GTA IV Car 'Lokus' - I think this is a mk2 GS300

this is another car from the GTA 4 game which bares a passing resemblance to a LEXUS GS MkII. These cars may be rare in the UK but are a big seller in the US so it's appearance in a computer game is not so odd. However the Rockstar game developers deliberately change some details to avoid copyright problems with car manufacturers, grills and headlights are altered just enough to make definitive identification impossible, plus they change the car name. If you have this game look out for this car, is it a GS MkII ?