How to open .gz , .tar, .tar.gz files

• .gz is the extension for gzip files (GNU zip, an open source file compression program)
• .tar is file format (in the form of a type of archive bitstream), name was derive from “tape archiver”. TAR is not a compression file type
• .tar.gz compressed tar file

You can extract/ uncompress .gz ,  .tar or .tar.gz files using Winzip utility or freeware like 7-zip