GT7 physics might be far from ideal, but overall I think it's pretty good overall. The Assetto Corsa for example, feels far from reality to me, to be honest, even if it has advanced physics calculations. Couple of months ago I went to a sim racing arcade, where they have these $2+K sim rigs and run AC, booked an hour and a half session. While the force feedback on the wheel was perfect, just like a real car, the cars behavior itself was questionable, especially the tire grip, or the lack of it. I ran couple of sessions with GR86 on Tsukuba, AE86 on Zandvoort and a drift 240SX on our local drift track which luckily was installed on their machines. The next day I went to that track in my 240. I'm far from being even somewhat experienced driver, however, drifting my real 240, which is less modified (less angle and stock engine power) is waaay easier than drifting it in AC. Same thing for grip driving.
I haven't tried GT7 with a wheel, but on a controller it feels pretty decent, except for some oversteer behavior, which is a bit exaggerated in certain cars.
Another sim that feels very close to real life to me is BeamNG.Drive.
Just my 2 cents.