Based on prior knowledge, we can analyze the relationship between the GT_POST feature and the presence of chronic heart failure in the context of myocardial infarction complications data.

The feature GT_POST represents the presence or absence of paroxysms of ventricular tachycardia at the time of admission to the intensive care unit.

To determine the relationship between GT_POST and chronic heart failure, we would need to analyze the distribution of GT_POST values for patients with and without chronic heart failure.

Here is a possible dictionary representation of the relationship between GT_POST and chronic heart failure:

```json
{
	"no": ["no"],
	"yes": ["yes"]
}
```

Based on the provided feature and task, we only have two possible categories for GT_POST - "no" and "yes". However, it is important to note that in this particular case, we don't have information about GT_POST values that are hard to predict. Therefore, we only include the known categories in the dictionary.

Please keep in mind that this is a general analysis and the actual relationship between the feature and the target variable may require more specific data or domain knowledge.