KY Cardinal:
There are a LOT of threads discussing GSH. If interested, search for both "shiners" and "shinners" as they have often been spelled both ways. Here are two threads I found. The first talks a fair amount about adding GSH; the second also discusses shiners but has a great deal of talk on crowded bass in general (thought you might find it all interesting).
"shinners" "Too Many Skinny Bass ..."