A BJP spokesperson said on Thursday the court acted with “due judicial process” to reach its verdict in the case, one of many Gandhi is facing.
Legal action has been widely taken against opposition party figures and institutions who have criticized the Modi government during its nine years in power.
Domestic and international media have also come under increasing pressure. Last month, tax inspectors raided the local offices of the BBC in Britain.
The Editors Guild of India said the raids demonstrated “a tendency to use government agencies to intimidate or harass press organizations critical of government policies”.
On Saturday, Gandhi, who recently completed a padayatra across India that was hailed as a success by commentators, said he would “do whatever it takes to protect the democratic nature of this country”.