I know this thread is a few years old but I was looking for this today. This is what I found from http://www.perlmonks.org/?node_id=919467 

GetOptions( #many other integer and string options
    ....
    "file=s{,}"=>\@files
    .....
    );

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In reply to Re: Reading from a glob into Getopt::Long by nicky
in thread Reading from a glob into Getopt::Long by biohisham

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