Currently you don't. It is a module in the App:: namespace. If you want to use the infrastructure generated by geoip steal the code from geoip or use it's json output in a pipe:

use JSON::MaybeXS;
open my $gh, "-|", "geoip", "--json", $url_or_hostname or die;
my $data = decode_json (do { local $/; <$gh> });
say $data->[0]{provider}; # [0] as it returns a list of matches
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