| Specifications | GA 300 GM | GA 3201 GM | GA 4121 GM | GA 4321 GM | GA 4521 GM |
| Number of rotors | 1 | 1 | 1 | 1 | 1 |
| Working width (m) | 3.2 | 3.2 | 4.1 | 4.2 | 4.5 |
| Swath delivery | To the left | - | To the right | To the right | To the right |
| Number of tine arms per rotor | 9 | 9 | 10 | 12 | 13 |
| Number of tines per arm | 3 | 3 | 4 | 4 | 4 |
| Drive | Central gearbox | Central gearbox | MASTERDRIVE series | MASTERDRIVE series | MASTERDRIVE series |
| Tyre type | Balloons 15 x 6.00 - 6 | Balloons 15 x 6.00 - 6 | Super balloons 16 x 6.50-8 | Super balloons 16 x 6.50-8 | Super balloons 16 x 6.50-8 |
| Bogie axle | Option | Option | Option | standard | standard |
| Transport width (m) | 2.75 | - | 1.75 | 1.95 | 2.2 |
| Transport width (m) | 9'2" | - | - | - | - |
| Linkage | 3-point - Cat. 1 + 2 | 3-point - Cat. 1 + 2 | 3-point - Cat. 1 + 2 | 3-point - Cat. 1 + 2 | 3-point - Cat. 1 + 2 |
| Highway Transport Lights | - | - | 22 | - | - |
| Minimum power requirement for PTO (kW) | 15 | 15 | 30 | 30 | 26 |
| Minimum power requirement for PTO (hp) | 20 | 20 | 30 | 22 | 35 |
| Tractor electrical equipment | - | 372 | - | - | - |
| Weight (kg) | 286 | 820 | 540 | 702 | 815 |
| Weight (lb) | 286 | - | - | - | - |
| Shock absorber | - | 7'3" | 9'2" | 9'7" | - |
| Clean swept width | - | 2.2 | 2.8 | 2.9 | - |
| Clean swept width (m) | - | 8'8" | 10'6" | 11'4" | 12' |
| Rotor diameter | - | 2.6 | 3.2 | 3.5 | 3.7 |
| Rotor diameter (m) | - | 5'5" | - | 6'4" | - |
| Transport width - arms removed | - | 1.8 | - | 1.95 | - |