Applications for short term visitor's visas must be submitted personally through a Gerry's Visa Service Center.
Gerry's Visa Service Centers are receiving applications in Islamabad, Lahore and Karachi.
If you are not resident of Pakistan you should normally apply at a Schengen Embassy or Consulate in your country of residence.
If you want to visit a Schengen country, apply for visa at the Embassy or Consulate of that country.
If you want to visit several Schengen countries, apply at the Embassy or Consulate of the country in which your main destination is situated.
If you intend to visit several Schengen countries but do not have a main destination, you should apply at the Embassy or Consulate of the Schengen country of your first port of entry.
As a general rule you must hand in your application in person during office hours.