Alexander Konovalov top 10% this year
My hobby is to answer questions about GAP (http://www.gap-system.org/, Twitter:@gap_system), a system for discrete computational algebra. There is a tag (gap) at the Mathematics Q&A site to label such questions, and also some suggestions on using this tag. If any of the two proposals for Q&A sites for Sage or for Computer Algebra Systems will reach beta stage, I would also be interested in answering GAP questions asked there.
Before asking about GAP at Mathematics Q&A site, please note that there are well-established support channels for GAP users such as GAP Forum and GAP Support where your question might be noticed quicker by a larger number of GAP users and developers of GAP and its packages; therefore, dependently on your question, GAP Forum and GAP Support may be more suitable places for posting it.