What do you guys even use as a random generator if the speed needs to be 10 GK/s?
Don't worry. You'll be fine with the Xoshiro256plus PRNG, which can handle up to 8 GB/s running on one core of a CPU.
If you manage to exceed 8 GB/s, PM me.

I'm totally confused now. What's the difference between 10 GK/s vs 10 GB/s?