This number is grossly exaggerated.

Rumors of our demise were obviously grossly exaggerated.

logically bankrupt and grossly unfair.

The sentences are grossly excessive and unconscionable.

The market had become grossly oversold by last Thursday, so that had to be worked out. And it looks like cold (at least seasonable readings) are going to continue, at least through next weekend.

were at best irresponsible and at worst, grossly unpatriotic.