The GDAL Perl bindings are distributed within the main GDAL source distribution but they are also available on  CPAN as  Geo::GDAL. They are maintained by Ari Jolma.

The README:  https://svn.osgeo.org/gdal/trunk/gdal/swig/perl/README

The documentation can be seen at  http://geoinformatics.aalto.fi/doc/Geo-GDAL/html/

Geo::GDAL is a part of the  Geoinformatica stack.

GDAL Perl Developer hints page