There is a beginning of close war about that question. It has 25 votes, just got closed, but has already 3 "reopen" votes only three hours after it was closed. Only quiz has given in comments a reason to vote (he was not one of the closer): he writes "Vague and sensationalsit. I really hope this question will stay closed. To be reopened it would need at least some editing to address questions raised in commebts what exactly is asked for".
If there were unknown papers by Grothendieck on any subject around, I would be very happy to learn it. On the other hand, I agree with quid. The question is too vague. In particular I am not very happy that my asking for precisions in comment was ignored by the OP.
I'd like people who have a strong opinion about what to do to explain their position here.