There are three different levels of GM-SYS (Basic, Intermediate and Advanced). The higher levels essentially allow higher numbers of stations, blocks, points and surfaces as well as having more features.
Basic:
- Provides simultaneous gravity and magnetic modeling in two dimensions, with up to 125 blocks and 1000 gravity stations.
Advanced
- Calculate and display gravity and magnetic gradients, calculate the response of a 2 3/4-D model as a Geosoft grid, and models can include up to 16, 000 points and 300 blocks. Advanced also includes the SEG-Y Reader, which can convert a 2-D SEG-Y file directly into a backdrop image projected directly onto your GM-SYS model cross-section.
| GM-SYS Level | # of Stations | # of Blocks | ># of Points | # of Surfaces | 2 3/4 D | Inversion | Seismic Image | Gradients | Grid Output |
| Basic | 1000 | 125 | Unlimited | 300 | - | - | - | - | - |
| Advanced | 16,000 | 300 | Unlimited | 750 | ✓ | ✓ | ✓ | ✓ | ✓ |
| Education | 500 | 50 | Unlimited | 300 | ✓ | ✓ | ✓ | ✓ | ✓ |