gem-status gets the list of gems you use from Gemfile.lock file and runs some checks on those gems. Checks that can be run are: * Does it has a license? If it does not, it can be a problem for distributing your software with this gem. * Is it Gpl? If it is, it can be a problem if your software or other gems are not GPL compatible. * Is the same in Rubygems.org? This is for people who uses his own gem server. This checks the gems are the same. * Does it has security alerts? This will search into the commits and into security mailing lists for possible security messages.