I've been suspicious from the start but post 884 cries out that this is fake. Sorry, but you don't store the VA (or more appropriately the lack of a VA) in your code. You just don't, I mean what use does it serve? None, that's what. Good code is efficient code. Efficient code doesn't have irrelevant data dotted in like that.
Then you have the idea that R* are supposedly sending out an update full of DLC data despite the fact that the update is designed primarily to fix V and Online, why would you include that stuff? Oh so there's probably some excuse that certain parts of the code are dependent on others, which is perfectly possible, but these are bug fixes in this patch. They fix garages and nerf briefcases or whatever (I haven't followed what they've actually been doing with these patches, but it's not to add DLC) That isn't dependent on some completely irrelevant DLC. In a well designed programming project, you'd have a rough idea of what code depends on what, this isn't some two man project it's a corporate team project, you have to make the code pretty easy to follow and easy for person A to edit person B's input, you would have a pretty succinct documentation of all of the particular code dependencies on a project this big. You also do what you can to reduce interdependencies between all of your different modules, you wouldn't allow a garage fix to get intertwined with some NY DLC.
Then there's the fact that no-one can replicate these findings and only a carefully selected number of people are allowed any other information.
Finally, I'm not the biggest programming buff in the world but GTA V is obviously developed in some kind of object oriented programming language, most likely C++ or a variant of it. Why would any objects like weapons and etc. be stored in what looks like an XML file?
My stance - this is a publicity stunt for a fan fiction mod project, one which would probably be pretty damn good, but I remain unconvinced that this is legit until someone can show me some hard evidence, I would love to be proved wrong, I really would, and I hope I'm not being too hostile in this post, I mean no hostilities whatsoever, I'm just really interested by all of this and hungry for answers.