As far as I know, there aren't any. It's whatever store you're trying to patronize. You park to the nearest entrance of that store.
Most of the entrances are closed down due to Covid-19. I know entrance B is open for sure.
Entrance j and e is a main entrance
Gurnee Mills is a large mall and has many entrances. Plan where you want to visit and then park near the closest entrance.
There are many main entrances they go by letters starting with a I believe going through K or j
There is no MAIN entrance. There are a number of entrances. I recommend going in the one nearest the store you mainly want to go to. I personally like going in the one near Macy's
Thanks! Your answer is awaiting moderation.