I've downloaded and tried it.
I don't understand the "need a machine program to run it on", I run it in Win2K on my laptop. When reading the rest of this, be aware G-code is new to me. So for those with another standing, please look at the program and make up your own mind.
It looks very much like a program developed to meet one's own requirements and not a general one. It's actually very annoying that it has too much good in it to just throw it out as junk. And I'm still looking to find if it can do what I want if I just find the right "buttons to press". (Read: doc. could be better.) One thing is good: it's basic and doesn't try to make much assumptions. But to be worth the asking price for me, it would have to do a bit more. I believe most of it would not be a big challenge for the programmer.
It seems from your referring to "us" that you are connected with the developer(s). I suggest that if you are open for feedback, open a new thread for discussion of this program. I'll be there. And I'll try to be constructive.
As you may have noticed, I won a copy of BobCad here on CNCzone.
So if that program can fill all my needs, I will drop GCode2000. But it may be good on the complicated stuff and not on basics. I use ProgrammersFileEditor as much as I do Word because they fill different needs. But at least until I get my copy, I'll look at GCode2000 and see if I can figure it out.
So my conclusion is it may be good, but expect to put in some artistic thinking to make it do what you need. If you don't it will not "think for you".
If you have years of experience hand-coding (or debugging) G-code, it's probably a super tool.