The 24-year-old Israeli is the Scottish Premier League champions' first arrival in the January transfer window.
The Hoops also have the chance to make the switch permanent at the end of the deal.
Gershon is due to meet up with his new teammates as they train in Spain during the winter break.
Restore Data
| Team | P | W | D | L | F | A | GD | PTS | |
| 1 | Celtic | 12 | 11 | 1 | 0 | 35 | 4 | 31 | 34 |
| 2 | Aberdeen | 13 | 10 | 2 | 1 | 28 | 15 | 13 | 32 |
| 3 | RangersRangers | 12 | 7 | 2 | 3 | 17 | 9 | 8 | 23 |
| 4 | Dundee UnitedDundee Utd | 13 | 5 | 5 | 3 | 19 | 14 | 5 | 20 |
| 5 | Motherwell | 12 | 6 | 1 | 5 | 16 | 16 | 0 | 19 |
| 6 | St Mirren | 14 | 5 | 3 | 6 | 19 | 23 | -4 | 18 |
| 7 | Dundee | 13 | 4 | 3 | 6 | 22 | 25 | -3 | 15 |
| 8 | Ross County | 14 | 3 | 6 | 5 | 12 | 22 | -10 | 15 |
| 9 | St Johnstone | 14 | 4 | 1 | 9 | 17 | 27 | -10 | 13 |
| 10 | Kilmarnock | 13 | 3 | 3 | 7 | 15 | 26 | -11 | 12 |
| 11 | Hearts | 14 | 2 | 3 | 9 | 15 | 24 | -9 | 9 |
| 12 | Hibernian | 14 | 1 | 6 | 7 | 15 | 25 | -10 | 9 |
| > Scottish Premiership Full Table | |||||||||
