Gronk's New GF -- The Endorsements Cometh

Rob Gronkowski's new girlfriend just scored her first big modeling campaign -- landing a gig as the "brand ambassador" for a big watch company ... and she looks good. 

As we previously reported, Gronk is all BF/GF with Camille Kostek ... a former New England Patriots cheerleader, news anchor and model. 

Now, Kostek is the "fresh face" for the Benrus Watch Company -- which says it hired Kostek because "she represents all of our standards; beauty, intelligence, and a commitment to excellence."

Weird, that last one is more of a Raiders thing ... 

Anyway, congrats!