The ground purchase is not the first time the club has been helped by Frances Connolly, who has family connections to the area.
In 2019, an arson attack at the club sparked fears over its survival.
But with her help the club did survive, and now with a grant from the foundation she and her husband set up in memory of her mother.
“We could not have done anything without the Kathleen Graham Trust and we owe a huge debt of gratitude to them for that,” Galloway said.
The Connollys from Moira, County Down, and who live in England, have given away more than half of the £115m fortune they won in 2019.
The Kathleen Graham Trust, named after Frances’ mother, is one of two foundations the couple set up after their lottery win.