There is a reactivate option - (this is in the help section available within GP)
Reactivating an employee card
Use the Employee Maintenance window to reactivate an employee card that has been inactivated. You can reactivate employee cards only if the number of active employees is less than the number your company is registered for.
To reactivate an employee card:
Open the Employee Maintenance window.
(HR & Payroll >> Cards >> Payroll >> Employee)
Enter or select an employee ID.
Unmark Inactive to reactivate the employee card.
You can enter an adjusted hire date for the employee.
Choose Save. The Reactivate Employee window will open.
Mark the records to reactivate. Your options are:
State Tax Records
Local Tax Records
Pay Records
Deduction Records
Benefit Records
Direct Deposit
If you’re using Human Resources and you selected Human Resources as your accrue type in the Attendance Setup window, you can mark the Time Records option.
Choose OK. All marked records will be reactivated.
