Maybe still water doesn’t run deep. That’s the takeaway from GQ’s cover story about Rob Gronkowski. What you see is what you get with the Patriots hard-partying pass catcher. What we learn is that Gronk likes to travel light — usually 12 pairs of boxers, a suit, three pairs of shorts, and a couple of tank tops — his preferred drink at the bar is Vodka and water — “so you’re getting your fluids’’ — he’d rather have dinner with Donald Trump than Hillary Clinton — “Because he’s Donald Trump!’’ — and taught himself to dance in high school — “I was shy at dancing. I was practicing in the mirror. Dancing everywhere. Then I just started feeling good. I started feeling coordinated. I started feeling the music better.’’