I am not familiar with BIOPAC, and I’m not sure I understand your question. There is an EyeTracker element in PennController, but it is not very accurate and I haven’t spent much time developing it, which is why I never documented it. The way it currently works, it sends the data it collects to a distant URL, so you’d need to set up some interface to retrieve your data on some server, in much the same way that collecting audio recordings works (though the method is not fully transposable). Everything else is saved in the results file of your experiment.
Feel free to elaborate on your questions