Hi,

The eligibility criteria for GUJCET-2021 states that a candidate must have cleared in all subjects in class 12th. Since, you failed in physics and chemistry in GSEB board, you are not eligible to appear for GUJCET as they both are main subjects.

You will have to appear first for improvement exams and then after you clear them, then only you can appear for GUJCET.

You may refer to this link for more details on the eligibility criteria: https://engineering.careers360.com/articles/gujcet-eligibility-criteria

I hope this helped you.