Yes! There’s a canonical algorithm called the “Blelloch scan” for prefix sum (aka prefix scan, because you can generalize “sum” to “any binary associative function”) that’s very gpu friendly. I have… fond is the wrong word, but “strong” memories of implementing in a parallel programming class :)

Here’s a link to a pretty accessible writeup, if you’re curious about the details: https://developer.nvidia.com/gpugems/gpugems3/part-vi-gpu-co...