/usr/share/perl5/Device/Gsm/Sms/ is in libdevice-gsm-perl 1.60-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/perl5/Device/Gsm/Sms/Structure.pm
/usr/share/perl5/Device/Gsm/Sms/Token/
/usr/share/perl5/Device/Gsm/Sms/Token.pm
/usr/share/perl5/Device/Gsm/Sms/Token/DA.pm
/usr/share/perl5/Device/Gsm/Sms/Token/DCS.pm
/usr/share/perl5/Device/Gsm/Sms/Token/DT.pm
/usr/share/perl5/Device/Gsm/Sms/Token/MR.pm
/usr/share/perl5/Device/Gsm/Sms/Token/OA.pm
/usr/share/perl5/Device/Gsm/Sms/Token/PDUTYPE.pm
/usr/share/perl5/Device/Gsm/Sms/Token/PID.pm
/usr/share/perl5/Device/Gsm/Sms/Token/SCA.pm
/usr/share/perl5/Device/Gsm/Sms/Token/SCTS.pm
/usr/share/perl5/Device/Gsm/Sms/Token/ST.pm
/usr/share/perl5/Device/Gsm/Sms/Token/UD.pm
/usr/share/perl5/Device/Gsm/Sms/Token/UDH.pm
/usr/share/perl5/Device/Gsm/Sms/Token/VP.pm