Mr. Gillis appears as a Supporting Character in Red Dead Redemption 2.
Mr. Gillis is the father of Mary Linton and Jamie Gillis. He disapproved of Mary's romantic relationship with Arthur Morgan due to his affiliation with the Van der Linde gang.
He has become verbally abusive towards to his children and addicted to alcohol, whoring, and gambling. He has started pawning off his family's valuables, likely to pay off his debt.