Pay code / Pay type question

I know how to set up Pay Codes in Microsoft Dynamics GP. However, I had a question.

Is the ‘Pay Type’ the driver that would move an expense from the Payroll Batch once posted, into A/P?

I am looking to set up 2 pay codes and notice I do not have a Pay Type setup option anywhere except for within the Pay Code Setup screen.

The goal is to pay 2 items with the payroll direct deposits weekly. P for Per Diem and R for Reimbursable Expenses.

Currently we have the E which is entered when a person’s time is entered, and when the payroll batch is committed/posted, the expense moves into open A/P.