Are the restrooms separated by gender?

Yes, most companies have separate restrooms for men and women.

Separate restrooms are standard in factories, nursing care facilities, offices, and commercial facilities.
However, depending on the size of the building and its facilities, there may be unisex restrooms or only a single restroom.

You can check the details of the facilities in the “Work Environment” section of the job listing.
If you have any concerns, you can also check with the recruiter in advance, so please feel free to ask.