These payroll cost will be inserted in GL_Interface table once transferred to GL from where you can import these into journal batch using Journal --> Import. Normally these journal with be created with journal category Payroll and description like Payroll: request id (of transfer to gl process).
Because these journal doesn't automatically get imported you have option to write a custom process where you can update information about journal. Here is information about columns of GL_INTERFACE
REFERENCE1 Batch name.
REFERENCE2 Batch description
REFERENCE4 Journal entry name
REFERENCE5 Journal entry description
REFERENCE6 Reference or journal number
REFERENCE7 Reverse Journal Flag
REFERENCE8 Reverse Journal Period
REFERENCE10 Journal line description
So you can update these columns with information what you want on Journal. e.g. if you want to make journal with description payroll cost (including bonus) then you can update REFERENCE5.
Please let me know if you have any questions on this post.