Plenty of cars have oil pressure AND oil level warning lights.
Only you guys with GT4's in your hands can tell us if they have them though.
YGT-04A does you car not turn over as in looks like it's seized
Many years ago I had a car run low on oil, light came on for a second. Topped up the oil to the correct level and drove another 100km home. Next morning engine was seized, hope this hasn't happened to yours.