Rob Gronkowski -- Hits On Hot Reporter ... During Live Interview

File Under: YEEAAHHHHH GRONK!!!!

This is the story of Fort Myers Fox 4 reporter Tara Molina ... who tracked down Rob Gronkowski on the beach this week -- and decided to ask him how he plans to spend Valentine's Day.

His response? Well ... it's about as Gronk as it gets.

Just one tip for Molina -- don't plan on getting flowers ... we know how Gronk feels about those.