GPSC is Gujarat Public Service Commission exam. As you have asked about the GPSC paper pattern, check below for it

The competitive Exams will be held in two languages - Gujarati as well as in English

The maximum age limit increase 2 years from 28 to 30.

The preliminary exam content will be objective type which includes
verbal skills (150 marks)
Reasoning (150 marks)
General knowledge (200 marks)

The selection of the applicants from prelim to mains will be of 6 times to the numbers of posts.

In mains, there will be 5 subjects:
Gujarati (200 marks)
English (100 marks)
Optional subject descriptive (200 marks)
GK I & II Objective(200 marks each)

GK paper-I contains:

History & Culture of Gujarat, General Economic matters, Public administration and subject related to state Govt services.

GK paper-II contains:

Current affairs, geography, science & Technology, ethic & integrity
The selection of the candidates from mains to interview will be of 3 times to the numbers of vacancies.

Interview is of 100 marks. Blind candidate will avail 20 minutes more in objective test and 30 minutes more in subjective.

Some tips for the exam:
A regular study of 5- 6 hrs. is needed to get good marks.
Try to solve previous year papers.
You can also join coaching classes if required.
You can choose the optional subject as the course which you have studied in graduation