2020 LHD Euro-spec GT here.
In addition to the tables shown above I had to do a few more changes, because at idle these tables didn't seem to work. The changes I had made to them may have worked at higher revs or speeds, but at idle they didn't. At idle the valves were always about 50% or so open in Normal mode, and about 80%, give or take, in Sport, despite having put a 1 in these tables at all revs.
It turns out there are a couple of extra tables which control the idle, and which apparently take precedence.
In my particular case it was these two.
Stock version:
which I changed to this:
And this one:
which I changed to this:
Now my exhaust valves are open all the time, at any rpm, in any conditions, in all modes except Quiet. And they still close completely in Quiet, like they should.