The plea deal for the 66-year-old Gordon, announced Monday, envisions a probationary term and restitution of $3,000 on a charge of misapplication of entrusted property.
Prosecutors say Gordon used the card at various Atlantic City casinos on 26 occasions, racking up nearly $15,000 in expenses.
After being confronted by union officials, Gordon repaid nearly $7,500.
Gordon led the union from 2000 to 2006. She now lives in Fayetteville, North Carolina.