I tried out the Friends of Inform version of this extension (Version 10/161003), and used:
The measurement of the graphics window is 40.
The position of the graphics window is g-placeleft.
The equivalents in the Inform 7 built-in version (9/160121) seem to to be:
The graphics window proportion is 40.
Graphics window position is g-left.
However, I can’t find any equivalents for:
[Don't automatically open the graphic window]
When play begins (this is the new graphics window construction rule):
do nothing.
The new graphics window construction rule substitutes for the graphics window construction rule.
or
open the graphics window
or
close the graphics window
What would I need to do to achive the same result using the built-in extensions? Thanks.
Edit: I no longer need to use the older, built-in extensions, so if there is no easy answer then don’t worry 
I think the answer is probably that the missing features of the old version are from Flexible Windows rather than Simple Graphical Window.