In short and simple terms, the phrase "gratuitous amounts" means an excessive or unnecessary quantity of something.
Sentences with «gratuitous amounts»
This one simply likes to post pictures of gratuitous amounts of RICH food at restaurants but you KNOW she isn't eating it all. (mindbodygreen.com)
The combination of lugging around hefty batteries and electronics, a suspension tuned for comfort, and low rolling resistance tires results in gratuitous amounts of body roll and understeer. (cnet.com)
And it's not just her — adding gratuitous amounts of sugar to coffee is now quite common. (mindbodygreen.com)