File a petition in GWOP seeking to restrain wife from taking the child out to the jurisdiction of Court. You can seek immediate custody of child on above apprehension. As per Section 6 of Hindu Minority and Guardianship Act, 1956, custody of child below five years will be with mother with visiting rights to father and custody after five years of age will be father with visiting rights to mother. Though this is general rule, this is not fixed law, in special circumstances child above 5 years especially when the child is girl, custody is given to mother with visiting rights to father. But mother has to establish such circumstances.