The event will include the launch of the club's new away kit, an open training session and a chance to meet the players for photos and autographs.
There will also be the opportunity for fans to put their questions to chairman Paul Baker and manager Gary Johnson.
There will be a tombola, a fully licensed bar will be open, the Robins Trust will be on hand to sign up new members and there will be a 'Hot Shot' competition for youngsters to measure the speed of their shooting, with prizes on offer for the winners.
Doors open at 11am and the event will run until 3pm, with a full timetable to follow.