Presumably it's going to be based on Gump and Company, Winston Groom's sequel to his original novel Forrest Gump.
I'm probably one of the few who will actually admit to reading Gump and Company and let's just say that... it wasn't good. The most ridiculous part was when Forrest and Lieutenant Dan commandeer a tank during the Gulf War, drive all the way to Baghdad and capture Saddam Hussein. That comes after Forrest invents New Coke, steers the Exxon Valdez into the rocks and gets involved with the Jim and Tammy Bakker scandal.
Like I said: it wasn't good.