The law firm Jersey Gov. Chris Christie hired to handle the George Washington Bridge scandal has cost taxpayers $7.3 million, a new report said Friday.

Gibson Dunn billed the state $784,459 for May, June and July, NJ.com said.

The firm had already been paid $6.52 million on the legal bills through April.

Christie hired Gibson Dunn in January after his top aides blocked access lanes to the busy span in an apparent act of political ­revenge against the mayor of Fort Lee for not endorsing him.