If I understand correctly, the term 'gravity turn' refers to a specific way to turn from the initial near-vertical launch direction to a final tangential orbit direction in an efficient manner. It's described as a relatively small tangential nudge, return to essentially zero angle of attack (or displacement angle - I have asked separately about that) and the trajectory will naturally slowly turn over "sideways" into the tangential direction.
As the Kerbal Wiki wisely teaches us:
Then once a certain altitude is reached, a slight turn is made, called the pitchover maneuver. By turning away from vertical slightly, gravity will pull the velocity vector of the craft down towards that direction and the craft has to tilt to follow it.
In modern, large launch vehicles with sophisticated aerodynamic models, and vectored and throttled thrusts, is the classic gravity turn maneuver still approximated - either by design or coincidence - or is the actual turn the result of such a complex optimization problem that a classical gravity turn per se is no longer recognizable?