Just read through this topic. Lots of good info and different perspectives about the GSF. I have added them to my pond and will continue to do so. I catch them from a drainage ditch that is loaded with small ones. And I am pretty sure these are pure GSF as I have never caught any BG there. I will say this though that I don't catch many out of my pond because I have lot of hungry LMB. Any I catch this year I will post pictures.
