Dear Avani, 

It will start after you appear in the NEET UG examination which is scheduled on May 6, 2019. The admission procedure for all 85% MBBS seats in the government medical colleges of Gujarat will be conducted by the Admission Committee for Professional Undergraduate Medical Courses (ACPUGMEC). It is the authority responsible for Gujarat MBBS 2019 admission.

In nutshell, after the exam, keep a track of the website and fill the application form as and when they become available, to indicate your interest in participating in state counselling of Gujarat. Aside from the official website, you can track the application and other important dates and procedure of admission through the link given below. All information pertaining to Gujarat MBBS admission is present here and new info will be updated as soon as official dates are released.

https://medicine.careers360.com/articles/gujarat-mbbs-admission

Hope it helps. All the best!