Hi I would like to work as a Gateline Assistant, please can you help me

Hi Farhad.
All of our current vacancies can be found at https://careers.firstgroup.co.uk/jobs/search.
At the bottom of that page there is also the facility for you to register for job alerts, meaning when any future vacancies are advertised that match your set criteria, you will receive an email notification.
Good luck in your search!