Forest Green welcome back striker Isaiah Rankin (suspension) while defender Lee Ayres (groin) and Curtis Macdonald (ankle) are both fully fit.
Mike Fowler (ankle) and Jeffery Imudia (knee) remain long-term absentees.
Forest Green boss Dave Hockaday told BBC Radio Gloucestershire: "It doesn't really matter how we've got here, we're here.
"Our form over the last quarter of the season has been fairly reflected in the results.
"We're in a good position as regards momentum and we need to do a proper professional job at Grays."
Source: BBC Sport
Source: BBC Sport