That's in general - wondering if anyone has anything specific to the Peugeot setup - I'm guessing the 308 and 308cc should be closely related to this.
My Nissan manual recommends the front to rear pattern with no crossing from rears to front every 10,000km. Not sure with the setup of the RCZ whether crossing the rears when swapping to the front would make any difference.
Additionally, since fronts on the RCZ would wear faster, current tests show that the better tyres should always be at the rear for best traction performance, so I'm thinking 3000miles/5000km for rotation would be a good rotation point considering how hard the RCZ tends to be driven.