backup -restore question

[Julie Nishimura]

Hello there,
One of our PostgreSQL 9.4.1  databases has been backed up as *.gz file with the 
compression 9 "pg_dump -Z 9". What is the right format of restore this file 
when needed? Can I run the restore from a compressed file or I need to unzip 
the file first, then run pg_restore? Thanks