ORA-39001: ORA-39000: ORA-31640: ORA-27041: and Linux-x86_64 Error: 13: Permission denied
The main issue is Linux-x86_64 Error: 13: Permission denied

cd /u01/app/oracle/admin/XE/dpdump/
 chmod 777 -R gsw


Then login as oracle user and run the same command again