Hi sim6, you understood well.
The Gapps widget could be ignored (but not deleted, I guess) and you can install the free apps you choosed.
At the 1st use of each app you elected, you’ll be able to turn each one as your default app.
Eg. : I choosed to use OperaMini as default broswer, the “native” one is sleeping and never run when I’m opening an hypertext link. And so on for each single app I’m using.