1)if muncipal corporation has corrected your father name in your birth certificate based on his PAN card , election card etc the passport authorities should not have any problems in issue of passport to you
2) further letter has been issued by sub registrar office in this regard .
3) the passport office should issue you passport .
4) please clarify has the passport authorities given in writing that court order is necessary?
5) file writ petition in Gujarat HC to direct passport office to issue passport