Dinesh if you have committed an error while filling the GUJCET form then you should mail to the official address of GUJCET exam administration stating about the error and providing all the information about yourself and your form number. Try to do it as early as possible so that they can make changes in your application form before releasing the admit card.

You can also call this Helpline Number: 18002335500 and raise your query they can also either correct your error or guide you how to rectify the gender error in your application.

Feel free to ask if you have any more queries. All the best!!