The Blues' pair scored on five and 45 minutes respectively as Trinity left The Jakemans Stadium with pre-season bragging rights in the Lincolnshire Senior Cup.
United were unable to muster too much of a response, although Ricky Miller did force Phil Barnes into a couple of smart saves.
Boston (3-5-2): Ashley Timms; Stefan Galinski (Charley Sanders 57), Scott Garner, Carl Piergianni; Peter Bore, Ian Ross, Gary Mills (Ben Fairclough 57), Ben Milnes (Spencer Weir-Daley 41), Joe Lamplough; Marc Newsham, Ricky Miller. Subs (not used): James Reed, Sam Vince (gk).
Gainsborough (4-4-2): Phil Barnes; Dominic Roma, Tom Ward (Liam Davis 64), Greg Young, Josh Lacey; Simon Russell, John Williams, Michael Leary, Ryan Williams; Mark Jones (Darryn Stamp 82), Brad Barraclough. Subs (not used): Josh Batty, Jake Park, Michael Emery (gk).
Referee: Wayne Porter