GMail Drive is a Shell Namespace Extension that creates a virtual filesystem around your Google GMail account, allowing you to use GMail as a storage medium. GMail Drive is a Shell Namespace Extension that creates a virtual filesystem around your Google GMail account, allowing you to use GMail as a storage medium. GMail Drive acts as any other hard-drive installed on your computer. You can copy files to and from the GMail Drive folder simply by using drag'n'drop like you're used to with the normal Explorer folders.