There were several GNX vehicles equipped with moonroofs (glass) and sunroofs (steel). These were retrofitted by ASC and most have documentation, and they are considered ASC-authorized but not GM-authorized (i.e., not a "factory" option on the Trunk ID or Window Sticker). 035 is legitimate in this respect and is so recognized by GNXRegistry.ORG since this car's moonroof was among those installed by ASC. Interestingly, there is no order to the "roofed" cars-- i.e. they were done by individual request and not by block and the GNX numbers vary widely.
I know the owner of this car and it has a very interesting history as part of a large high-dollar collection in GA. The previous owner used to loan NASCAR legend Bobby Allison this particular GNX to buzz around the Atlanta area. As far as condition, I inspected this car simultaneously with Terry Shaw last year. It is a nice driver-quality car, but not a show car. Original turbo is gone, but I may have a line on its location.
Hope this helps!