Most tar commands also unzip files (and can create them): for unzipping, tar xvzf yourfile.gz
will probably work on Linux and a lot of other Unix systems without going near Perl.
Its a bit dirty, but if you are doing it in a Perl script, you can do that as a system command enclosed in backticks. However the other methods suggested are much more preferable if you are doing this within Perl.
Update - ignore this reply. I should have read the question more carefully.. :-(
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