After a long wait the GpsDrive wiki has been relaunched in all its MediaWiki glory and includes updated and all new content.
You can enjoy it at: http://apps.sourceforge.net/mediawiki/gpsdrive/
A wiki is a collaborative help site. As GpsDrive is purely a non-profit public project we depend on the help of our users for writing documentation (and even writing the program!). If you'd like to help out or have some tips to share, just create yourself a SourceForge account, login, and go for it!
For now you must login to the Wiki site with your SF ID, and then contact the GpsDrive mailing list with your SF login ID requesting "editor" status.