The 20-year-old joined the League One outfit on a temporary deal back in November.
Ehmer has made 11 appearances in all competitions for the Gills during the current campaign.
The youngster has enjoyed previous loan spells with Yeovil Town, Preston North End, Stevenage and Carlisle United.
Gillingham return to action on Saturday when they host Sheffield United in the league.
Restore Data
| Team | P | W | D | L | F | A | GD | PTS | |
| 1 | West Bromwich AlbionWest Brom | 6 | 5 | 1 | 0 | 10 | 2 | 8 | 16 |
| 2 | Sunderland | 6 | 5 | 0 | 1 | 13 | 4 | 9 | 15 |
| 3 | Burnley | 6 | 4 | 1 | 1 | 13 | 4 | 9 | 13 |
| 4 | Sheffield UnitedSheff Utd | 6 | 4 | 2 | 0 | 9 | 3 | 6 | 12 |
| 5 | Blackburn RoversBlackburn | 5 | 3 | 2 | 0 | 12 | 6 | 6 | 11 |
| 6 | Leeds UnitedLeeds | 6 | 3 | 2 | 1 | 9 | 4 | 5 | 11 |
| 7 | Swansea CitySwansea | 6 | 3 | 1 | 2 | 7 | 4 | 3 | 10 |
| 8 | Watford | 6 | 3 | 1 | 2 | 10 | 9 | 1 | 10 |
| 9 | Oxford UnitedOxford Utd | 6 | 3 | 0 | 3 | 10 | 8 | 2 | 9 |
| 10 | Derby CountyDerby | 6 | 3 | 0 | 3 | 8 | 7 | 1 | 9 |
| 11 | Norwich CityNorwich | 6 | 2 | 2 | 2 | 8 | 7 | 1 | 8 |
| 12 | Middlesbrough | 6 | 2 | 2 | 2 | 6 | 5 | 1 | 8 |
| 13 | Bristol City | 6 | 2 | 2 | 2 | 8 | 12 | -4 | 8 |
| 14 | Queens Park RangersQPR | 6 | 1 | 4 | 1 | 8 | 9 | -1 | 7 |
| 15 | Luton TownLuton | 6 | 2 | 1 | 3 | 5 | 8 | -3 | 7 |
| 16 | Hull City | 6 | 1 | 3 | 2 | 5 | 7 | -2 | 6 |
| 17 | Stoke CityStoke | 6 | 2 | 0 | 4 | 4 | 9 | -5 | 6 |
| 18 | Millwall | 6 | 1 | 2 | 3 | 9 | 9 | 0 | 5 |
| 19 | Coventry CityCoventry | 6 | 1 | 2 | 3 | 6 | 8 | -2 | 5 |
| 20 | Plymouth ArgylePlymouth | 6 | 1 | 2 | 3 | 5 | 10 | -5 | 5 |
| 21 | Sheffield WednesdaySheff Weds | 6 | 1 | 1 | 4 | 6 | 12 | -6 | 4 |
| 22 | Preston North EndPreston | 5 | 1 | 1 | 3 | 3 | 9 | -6 | 4 |
| 23 | Portsmouth | 6 | 0 | 3 | 3 | 7 | 13 | -6 | 3 |
| 24 | Cardiff CityCardiff | 6 | 0 | 1 | 5 | 1 | 13 | -12 | 1 |
| > Championship Full Table | |||||||||
