Ladies suffer another transfer blow as star striker joins Durham
ahead of the new campaign.
Lee Sanders' side finished third in the Championship table last season.
"I'm excited to get started and hit the ground running," Galloway said.
"After hearing what Durham's ambitions were in terms of wanting to go on and succeed, I thought I could play a part in that and could play a vital role.
"I've had a little bit of experience in the WSL, but that was obviously coming on off the bench.
"I managed to get six goals though, and that gives me a bit of confidence.
"I'm just ready to step-up my game."
Sanders said the move underlined Durham's commitment to securing the best players in the area.
"I'd like to welcome Bridget to the club and I'm delighted she's signed for us," he said.
"We've not hidden the fact that we need to build our squad and acquire the best young talent we can in the local area - including what we already have within the club and inevitably some players from outside the club as well - as we look to move forward.
"She'll add real competition for places in the firstteam squad and comes with a great track record in the National League.
"She's a striker, she scores goals - that's what we've brought her in to do.
"We're really excited to see what she can bring to our forward line and if she can contribute to our goal tally then I'm sure we'll have another really successful season."
Sunderland Ladies are expected to strengthen their squad with the additions of Olivia Watt and Emily Scarr, both of whom recently left Middlesbrough.
Galloway's departure nevertheless underlines the work to be done ahead of a new campaign if the Black Cats are to replicate their outstanding form from last season.