Based on prior knowledge, GT_POST represents the presence or absence of paroxysms of ventricular tachycardia at the time of admission to the intensive care unit. 

To analyze the relationship between GT_POST and the presence of chronic heart failure, we would need access to data that includes the GT_POST feature as well as the target variable indicating the presence or absence of chronic heart failure. Without actual data, it is not possible to definitively state the relationship between these variables.

However, based on common medical knowledge, it is expected that the presence of paroxysms of ventricular tachycardia may indicate a higher risk for the development of chronic heart failure. In this case, patients with the value "yes" for the GT_POST feature would be more likely to have chronic heart failure compared to those with the value "no".

To generate the requested dictionary, considering the possible values for GT_POST, we can follow this format:

```json
{
	"no": ["no"],
	"yes": ["yes"]
}
```
Since GT_POST is a categorical variable with only 2 possible values according to the provided category, the lists for both target classes would contain only a single value each.