There are a lot of Grothendieck's writings at http://grothendieckcircle.org/ . If you have stuff that they don't, maybe you could share with them?

I didn't realize that there was so much stuff unavailable til now. I remember reading that he burned a 55 gallon drum full of papers to the dismay of some of his admirers. I figured anything he wrote by now was either online or destroyed.

I suspect this more recently revealed stuff can't be published for various reasons, such as crazy personal attacks on other mathematicians. Some of the older stuff had some of that.

Récoltes et Semmailes (Reapings and Sowings, a big semi-autobiographical rant) is online in French and partially translated to English. It might give you an idea of what you are getting into. At the time I tried to read parts of it, machine translation wasn't as good as it is now. So maybe I can try again with DeepL or something.