(Adds comment from Peninsula head Diniz) RIO DE JANEIRO, July 8 (Reuters) - Brazilian food retailer GPA has settled an arbitral dispute with the real estate arm of Brazilian investment fund Peninsula, it said in a securities filing on Thursday, without disclosing terms of the agreement. The Fundo de Investimento Imobiliario Peninsula initiated arbitration proceedings against GPA, a subsidiary of France’s Casino Guichard Perrachon SA, in 2017. The dispute pertained to long-term leases GPA holds on 60 Peninsula properties, the company said. “The settlement agreement reached by GPA and Peninsula resolved past controversies and improved the Contracts, maintaining the long-term leases, with enhanced new rules more adapted to the current market conditions,” GPA said in the filing.