The original pink Porsche coolant was G12. Then there was G12+, G12++, and now G13. They're all compatible, with G13 being the most recent and what you'll find in a new Porsche/VW/Audi.
I got a ton of it on clearance last year from AutoZone, and I still have enough for one more fill - just in case.
If I hadn't found such a good deal and stockpiled the stuff, I would have just bought Zerex G40 or Dex-Cool.
M&M act would require Porsche to provide their branded coolant for free if it were the 'only' kind allowed. Of course if it's reasonably priced then it's much easier to just recommend Porsche coolant.