ACUCOBOL-GT is an ANSI-85 COBOL compiler and runtime system (ANSI X3.23-1985 and the ANSI X3.23-1989 supplement). ANSI COBOL is divided into a series of required and optional modules, each of which has various levels of implementation. ACUCOBOL-GT conforms to the following levels for each of the required modules (range of levels in parentheses):
| Nucleus (1-2) | Level 2 |
| Sequential I-O (1-2) | Level 2 |
| Relative I-O (0-2) | Level 2 |
| Indexed I-O (0-2) | Level 2 |
| Inter-Program Communication (1-2) | Level 2 |
| Sort-Merge (0-1) | Level 1 |
| Source Text Manipulation (0-2) | Level 2 |
| Segmentation (0-2) | Level 1 |
ACUCOBOL-GT does not support the optional modules: Report Writer, Communication, or Debug.
The following sections summarize various extensions and limitations ACUCOBOL-GT has with respect to the standard.