ThanksNo, it's not even confirmed as coming to PC, the previous one never did, although success of GTA V means people are hopeful this time.
Even if it does I reckon you'll be waiting over a year for a PC version.
Didn't see anything on there website saying what platforms it was available on...https://www.rockstargames.com/reddeadredemption2/
EDIT: Ok when you go to the order page it says...