To clarify, movie novelizations are canon where they align with what is seen on screen in the 6 films and the Clone Wars animated movie.
— StarWarsBooks (@DelReyStarWars) April 30, 2014
Somehow I doubt the size of the GFFA was ever clarified in either the films or TCW.
But let’s be honest. Lucasfilm gives the novelizations lip service and lip service only, ignoring them in favour of EU schlock whenever they can. That’s what they did before they gave the EU its new paint job; that’s what they’re still doing.