My other answer demonstrated that you can't use lens tilt to recreate the photo with sharper focus along Wacker Drive.
But it's not hard to achieve the goal with a regular lens.
It seems to me the plane of focus is somewhere near the closest Marina Tower on the far right (the round towers). Look at the floor of fully lit windows just above the "gap"...
Firstly, I believe you have a misconception. You quote,
Tilt until G is in the image (green).
and you ask,
What if G is not in in the image or cannot be placed into the image by tilting?
Unless you are tilting with a super-wide fisheye (I can't imagine such a thing), the hinge/PoF axis (G) will never be in the image. In the example in your question, the ...
For me, it is easier without the math. By "it" I mean the Scheimpflug Princple of course.
This is the mental model I use. It explains an untilted lens in terms of tilted lenses rather than vice versa.
Apparent depth of field is always wedge shaped.
The knife edge of the wedge is where the plane of lens tilt and the plane of the sensor intersect.
The whole idea behind the Scheimpflug method is being able to get a much greater depth of field that would otherwise impossible with the front standard parallel with the rear standard.
The depth of field moves parallel with the surface of the lens elements ( |...|). If the lens is tilted down, for example, then the depth of field is also tilted /. Now ...