[stuaxo]

A really quick google found this

http://registry.gimp.org/taxonomy/term/366

"This plug-in enables you to use the vast number of existing filters made for Photoshop's Filter Factory"

[stan_rogers]

It's not only not "in the box", it doesn't support many of the high-end filters/plugins pros depend on (something it has in common with many basic 8BF-compatible programs, like Corel's PaintShop Photo Pro and Topaz Labs' photoFXLab).