This is a weird bug I just found on Mac(High Sierra):
The y-position-parameter of gfx.init seems to be working "reversed", that means:
when I give the position 0, the window moves to the bottom of the screen,
when I type in 1080, it moves to the top of the screen(I'm a screen-height of 1080 pixels).
This is unlike Windows, where 0 is top and 1080 is bottom of the screen.
I could verify this on 5.941 and on 5.962.
This is odd, as this seems to be an obvious bug with all the gfx-scripts out there, so I wonder, if this is an occasional one.