Thanks for providing such a nice brush pack . I have added them in my brush collection and download link is diverted to your page . I hope you will like my 40+ Gimp brushes pack collection . Check it here - [link]
Comments and Tips from your side are always welcome .
Extract the .gbr files to your Gimp brushes directory. Ex: C:\Program Files\GIMP-2.0\share\gimp\2.0\brushes
If you haven't got the Gimp the windows installer can be found at [link]
It's up to you how to use the brushes. Just be creative and remember to give credit for making the brushes