URGENT and IMMEDIATE help required for system hang and continuous restart

Please make an appointment at the Apple Retail Store - Genius Bar and take it in for service. If you are not in the USA or cannot set up an appointment this way, then contact your local Apple Store directly.

I'm pretty sure there's an Apple vendor in Binghamton, NY.

The closest to Binghamton NY of any kind (with Mac service) appears to be the genuine Apple Store in Syracuse (64 miles away), according to this:

https://locate.apple.com/service/?pt=4&lat=42.098702&lon=-75.912543

Have you seen the details of this possibly-applicable recall program?

https://www.apple.com/support/macbookpro-videoissues/

You could consider calling the national number and asking for a courier pack to send it to a depot. This tends to take 5 days or more.

As a Developer, you may have access to additional support options that I have not kept up with. The one everyone always raved about was (discount) equipment purchase program. Maybe you could use an additional Mac for redundancy?

If yours fails their diagnostic, they replace the motherboard. We are not talking about flipping a few bits and all is well.

Some users got some relief by using a third-party Utility -- gfxcardstatus -- to restrict graphics to the on-chip graphics. This precludes using external display, but may keep it going until you can get a break to get it fixed.

https://gfx.io

Your visit to the genius Bar at a genuine Apple store for an evaluation is FREE with appointment, in warranty or out.

Yes, the problem is in the discrete graphics chip.

There are some theories on this forum and others about this issue. The one with the best traction is that the discrete graphics chip sometimes gets too hot. So hot that its contact with the motherboard may occasionally be compromised in some way. (Perhaps the surface-mount solder partially melts and changes the resistance on some of the lands, or one or more of them opens up.) Readers have reported that replacing the chip and getting a new one soldered in its place (a specialized job for these surface-mount components) seems to completely cure the problems in the 2010 model. But that just re-soldering the old chip does not cure the problem for very long.

There is not so much consensus on the later models involved. Nor has that solution been refuted or a different failure mechanism been proposed 'out in the open'.

The diagnostic they have been running in the store is nicknamed the Graphics Switching Test (GST). After it completes (they can run it for you on-the-spot) it puts up a full screen PASSED or FAILED Banner page. Failed and Apple will replace the motherboard for free, if you meet all the other requirements of the program.

Passed and you do not have the recall-specific problem. (You may have another problem, but standard Warranty and Applecare applies for getting it fixed.)

Wow thats tons of internal info there.. How did you get that?

Owning a similar model MacBook Pro, being interested in diagnostics and Hardware, reading everything I could find on the subject, knowing enough about similar issues to do some reasonable-ness checking and reject stuff that cannot possibly be true, then reporting back the distilled summary when you ask about it.

[can I ] run those test here

To the best of my knowledge, Apple has not released that test. They only run it at Apple Stores and Apple-Authorized Service Providers. The training on these issues has not been uniformly good -- you may need to club them on the head with a paper copy of the recall notice, and get them to look it what they are supposed to do in what order.