Gateshead enjoyed a 2-0 closing day victory against play-off rivals Cambridge United, while Halifax could only draw 1-1 at home to Kidderminster Harriers.
Town's semi final second leg will be on Sunday 4th May, kick-off 4.30pm.
Tickets for the home leg are now on sale and can be booked by clicking here.
Please Note: All bookings taken before 7pm on Sunday will be given priority and will be processed ahead of the ticket office opening on Monday morning. Season ticket seats will be held until 5pm on Tuesday.
Tickets for the second leg at the Gateshead International Stadium are also on sale from our online ticket office.
The International Stadium has a capacity of 11,800 and the second leg game will be all ticket.
Town fan will be situated on the South Terrace which is uncovered. This stand has a capacity of 3000.
Over 60's & Students: £9 *
Under 16's: £2 *
* Gateshead FC reserve the right to request proof of entitlement to reduced admission.