Last season's winners Bromley are already out of the competition - as are the side they beat in the final, Wrexham.
Vanarama National League leaders Notts County are also out of the reckoning after losing on penalties to Maidstone yesterday.
The highest place side left in the competition are Southend United.
Winners of their fifth round ties bag £6,000 while the defeated sides take home £1,750.
The draw takes place live on talkSPORT 2 from around 3pm with one of BT Sport's Vanarama National League pundits, Aaron McLean, making the draw.
The ball numbers for the fifth round draw are:
1 Gateshead
2 Dorking Wanderers
3 Maidstone United
4 Bracknell Town
5 Harrow or FC Halifax Town
6 Maidenhead United
7 Altrincham
8 Barnet
9 Torquay United or Taunton Town
10 Southend United
11 Aldershot Town
12 Banbury United or Coalville Town
13 Eastleigh
14 Hungerford Town
15 York City
16 Farsley Celtic