This is just a test to make some appealing counters. In the process I used multiple layers and filters. I would say, that after getting used to the slighty different way to handle things, the GIMP is a really powerful alternative to other, way more expensive graphic-programms on the market.
The support community is just fantastic. There are thousands of tutorials in all kinds of languages. Millions of brushes round it up.
From the link above you get a really good start with links, documentation and tutorials.
Cheers,
Chris
Cheers,
Chris