The Christmas Fund is growing closer to its goal, thanks in part to a hefty gift from Garco Construction and the people who work there. Garco’s $20,000 check, which includes $3,930 in contributions from its employees, is among dozens of donations to the fund that combine companies’ or owners’ gifts with contributions from employees. They add up to sizable gifts that will help pay expenses at the Christmas Bureau, a 10-day charity that gives toys, children’s books and grocery vouchers to low-income families.