Hi there,
you can use any cache/optimization plugin with GeneratePress.
The settings of alternative plugins will vary quite considerably depending on how your site is built, what plugins you’re using etc.
We personally find with a standard GP site there is very little need for more than Autoptimize and and server side caching. And the settings we provide are generally correct for all types of build.
But plenty of users are working with the various other optimization plugins out there.