Our parser is written according to Ucamco RS-274X Gerber Format Specification.
Revision 2016.12 is fully supported and revision 2017.05 compatibility is under development. The following commands and functions are tested:
| FS | Coordinate format | |
| Absolute notation | Supported | |
| Leading zero omission | Supported | |
| Incremental Notation | Deprecated Not Supported | |
| Trailing zero omission | Deprecated Not Supported | |
| MO | Unit mode | Supported |
| AD | Aperture definition | |
| Circle | Supported | |
| Rectangle | Supported | |
| Obround | Supported | |
| Polygon | Supported | |
| Circular hole in standard apertures | Supported | |
| Rectangular hole in standard apertures | Deprecated Supported | |
| AM | Declare aperture macro | |
| Comment, Primitive Code 0 | Supported | |
| Circle, Primitive Code 1 | Supported | |
| Vector line, Primitive Code 20 | Supported | |
| Center line, Primitive Code 21 | Supported | |
| Outline, Primitive Code 4 | Supported | |
| Polygon, Primitive Code 5 | Supported | |
| Moire, Primitive Code 6 | Supported | |
| Thermal, Primitive Code 7 | Supported | |
| Variable values | Supported | |
| Arithmetic expressions | Supported | |
| Lower left line, Primitive Code 22 | Deprecated Supported | |
| Primitive Code 2 | Deprecated Not Supported | |
| AB | Block aperture | Under development |
| Dnn | Current aperture | Supported |
| D01 | Interpolate operation | |
| Line | Supported | |
| Single quadrant arc | Supported | |
| Multi quadrant arc | Supported | |
| Coordinate data without operation | Deprecated Supported | |
| G01/G02/G03 in a data block with D01/D02 | Deprecated Supported | |
| D02 | Move operation | Supported |
| D03 | Flash operation | Supported |
| G01 | Linear interpolation mode | Supported |
| G02 | Clockwise circular interpolation | Supported |
| G03 | Counterclockwise circular interpolation | Supported |
| G04 | Comment | Supported |
| G36 | Start region statement | Supported |
| G37 | Ends region statement | Supported |
| G74 | Single quadrant mode | Supported |
| G75 | Multi quadrant mode | Supported |
| LP | Load polarity | Supported |
| LM | Load mirror | Under development |
| LR | Load rotation | Under development |
| LS | Load scale | Under development |
| SR | Step and repeat | Supported |
| Closing SR with the M02 | Deprecated Supported | |
| SR and AB nesting | Under development | |
| TF | File attributes | Supported |
| TA | Aperture attributes | Supported |
| TO | Object attributes | Supported |
| TD | Delete one or all attributes | Supported |
| M02 | End of file | Supported |
| G54 | Select aperture | Deprecated Supported |
| G55 | Prepare for flash | Deprecated Supported |
| G70 | Set the unit mode to inch | Deprecated Supported |
| G71 | Set the unit mode to mm | Deprecated Supported |
| G90 | Absolute notation | Deprecated Supported |
| G91 | Incremental notation | Deprecated Not Supported |
| M00 | Program stop | Deprecated Supported |
| M01 | Optional stop | Deprecated Supported |
| IP | Image polarity | Deprecated Ignored |
| AS | Axes correspondence | Deprecated Ignored |
| IR | Image rotation | Deprecated Ignored |
| MI | Mirror image | Deprecated Ignored |
| OF | Offset | Deprecated Ignored |
| SF | Scale factor | Deprecated Ignored |
| IN | Image name | Deprecated Ignored |
| LN | Level name | Deprecated Ignored |
Deprecated - occurrence of such commands is out of actual standard
Supported - the command is fully supported
Not Supported - parts of image can be missing or incorrectly rendered
Ignored - command has not effect or it cause minor modifications like mirroring or rotation
Under development - function fill be ready soon
For the purpose of commonly used drill files under Excellon NC format. Following commands from standard are supported:
| ; | Comment | Supported |
| T | Tool definition/selection (circular) | Supported |
| METRIC METRIC,LZ METRIC,TZ INCH INCH,LZ INCH,TZ M71 M72 | Measure mode | Supported |
| Xnn / Ynn / XnnYnn | Coordinate change / Drill | Supported |
| G00 | Route | Supported |
| G01 | Linear move | Supported |
| G05 | Drill mode | Supported |
| G85 | Slot | Supported |
| G90 | Absolute mode | Supported |
| G91 | Incremental mode | Supported |
| M30 | End of program | Supported |
| M48 | Start of header | Supported |
| M95 % | End of header | Supported |
All not listed commands are unsupported or have not effect on rendering.