Hi , your state domicile helps you avail the benefits of 85% state quota to which ever state you belong to . As you have mentioned that you have domicile of Gujarat state then you can definitely go for 85%  Gujarat state quota in order to get admission in government colleges of Gujarat .
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Dear Candidate,

A domicile certificate enables its holder to prove that he/she is a resident of the state either by birth or by having lived in Gujarat for more than 15 years. The document enables the holder to avail of the domicile /resident quota extended by the state in education and jobs.

Because you are having domicile of Gujarat you will be able to take admission through 85% State level quota even if you have studying in some other state.

Hope you got your answer.

Thank you