You are eligible for Computer Engineering if you have passed the 12th Science from A group and attempted GUJCET Exam, I have applied for admission from College directly but you can also apply by ACPC or GMGC website, there are no fees for addmission but if they charge it will be deducted from your main fees. The last dates will be updated on ACPC and GMGC websites. If you're not confident about your 12th Result (passing is still required) you can reserve before the actual process starts it will help you. Actually, it's the smooth and convincing process of admission no need for changes