You can manage your Drupal code in Acquia Cloud using a version control system (VCS), either Git or Subversion (SVN). You can use the command-line versions of Git and SVN or various GUI tools that include open source, commercial IDE plugins, or GUI clients. Acquia Cloud Free customers must use Git and not SVN.
Learn about using the VCS of your choice with Acquia Cloud:
After you configure your environment to work with the code repository that you'll use to manage your codebase on Acquia Cloud, you can check out a local copy of your codebase from the remote code repository.