You can get breakers with GFIs built into them(called GFCIs), but they're favored less than putting them at the outlet. ...
I think they are now a violation of the NEC. And they were delisted by UL years ago. They pose a hazard as they will not react fast enough to prevent a fatal shock. (and the only one's I've ever seen were outlawed as the breaker itself was a fire hazard.)
--Ricky
