I contacted Grayl Australia about the question and this is what they replied:
"That’s actually a tricky one to answer!   Though Grayl in the US have carried out extensive tests as to the efficacy of their filters on many waterborne impurities such as bacteria, heavy metals, and volatile organic compounds, etc…, as far as I can see, they have not specifically tested for Sodium Fluroacetate (1080). So I can’t give you a definitive and scientifically-backed answer on that one!   If you would like to see their full lab results from the filter tests they can be found HERE   As you must be aware, anecdotally, 1080 is supposedly  “safe” once it has broken down and dissolved in water, and traces are virtually undetectable in water samples taken 12-24 hours after bait application, but there are many like you who are understandably sceptical. We are over in NZ, and it is used extensively for pest control here, just like in Aus, and so again all I can offer is anecdotal assurances that many backcountry hunters are out there with Grayl bottles and filling them from streams in catchment areas where 1080 has been used upstream. Whether this is 100% safe, I am not able to scientifically say!   Sorry I haven’t really been able to answer your question with anything concrete, and thank you for re-sparking our interest to actually get them tested locally for their ability to filter out Sodium Fluroacetate and its broken down components, so that we can then say with confidence to our Aussie and Kiwi backcountry users that their filters will protect them from the potential harm caused by the use of 1080.   Hope this helps, and if you have any more questions, feel free to send them through."

It says in the supplied booklet the chemicals filtered are chlorine, benzene, chloroform . I'm not sure if it removes them I hope this may help