Can someone advice me about how to change the Gothram

Hi Iam Sridhar from Chennai. Recently married. We got married in a temple and not in the traditional way.

I now want to know how to change the gothram of my wife to my gothram.

Is there some thing of this sort or by literally marring her, changes her gothram to mine ?

Can you please help me in this matter with your proper advice and guidance ?

Regards,

Sridhar.
Email: ns_sridhar77@hotmail.com