Do you mean "GIH" brushes for Gimp?
Gimp Image Hose
Just go to deviant arts website and download some.
Install the actual GIH , ABR, or GBR files into your brushes folder.
GIH = Gimp Image Hose
GBR = Gimp Brush
ABR = Adobe (Photoshop), Brush
All these formats will work in Gimp as brushes. Be aware that too many installed brushes will slow GIMP load considerably.