Bleach 310 (Canon)

[Endrance]

also, I'll have to find the relevant episode again, but i believe grimjow was killed by espada 5, (spent a good 5minutes here trying to recall his name with no success :O) Noitora!
Yami seems to be the only arrancar to have survived.

Nobody knows if he is. He got blindsided by Nnoitra, but he wasn't dead, just severely injured (not so much that he wouldn't be able to survive it - we've seen characters having much wore injuries and still surviving although logic like that might not mean much in an anime like Bleach...). Ichigo protected Grimmjow when Nnoitra tried to finish him off. Last we saw was him lying on the ground, much like Yammy. After that the anime simply ignored Grimmjow completely without actually finishing the plot and ever explaining it fully in a logical manner, like so often in Bleach. I suppose we'll see him ruling happily as Führer of Grimmjow land (his own little part of Hueco Mundo) in the final credits or something.