The series has various support abilities that yield more gil from battle. They have been known as Gillionaire, Millionaire (取得ギルアップ, Shutoku Giru Appu?), Gil Farmer, Gil Plus, Gilfinder, and Smart Riches. They are useful for gil farming.
The Gil Band is an armor piece that multiplies the amount of money the party earns by 1.5. It is initially equipped on Edward in Edward's Tale. In the Crystals, a Gold Tail can be traded for a Gil Bandv2, which doubles the amount of money earned.
Although never mentioned, the Cat-Ear Hood headgear provides the Gillionaire ability, which doubles the amount of gil the party earns from enemies. It can be obtained by betting an Impartisan in the Dragon's Neck Coliseum and can be equipped by Relm.
The Gil Plus Independent Materia boosts the amount of gil earned from battles. Due to a bug, Level 1 will never produce the 1.5x amount that it is supposed to, and will always double the amount of gil earned from battles as though it were mastered. The effect is not stackable. Gil Plus can be purchased in Gold Saucer's Wonder Square for 1,000 GP.
Gillionaire is an ability that can be found or customized on a weapon. It requires using 30 Designer Wallet items to customize. Rikku's Celestial Weapon, Godhand, has this ability when fully-powered. The effect doesn't stack in case various characters are equipped with the Gillionaire ability.
Gillionaire is an ability found on the Lady Luck dressphere. It takes 100 AP to learn, and it can be learned after mastering Double EXP. It can also be accessed via the Horn of Plenty Garment Grid by passing through the red gate on the grid. The ability is stackable.
Gilfinder is a Thief job trait that increases the amount of gil enemies drop, usually by 150%. The ability is learned at level 5, and is enhanced by Assassin's Culotte, Palmer's Bangles and Andvaranauts.
The Collector Catalog accessory, with the Gilfinder II passive ability for a +50% increase in gil received from battles, can be won from Serendipity chocobo racing. Some recruitable monsters, such as a Level 1 Chunerpeton, have the Gilfinder II ability. This will apply to all enemies as long as the monster is active before the last enemy is defeated.
Together with other ingredients, a Collector Catalog can be upgraded to a Durable Collector Catalog, which has the Gilfinder MAX passive for +100% Gil, via Chocolina after the story's conclusion. Gilfinder, from a Delicate Collector Catalog, gives +30% Gil. Unlike Item Collector and Item Scavenger, where only the highest ranked version is used, Gilfinder bonuses from all three party members can combine for a net maximum of up to three and a half times the base amount of gil won.
The Diva's Headphones and Delicate Diva's Headphones accessories also increase the amount of gil earned by 10% and 5% respectively, though this does not stack with Gilfinder.
Smart Riches slightly increases the amount of Gil picked up by players, and can be customized onto pieces of equipment through using the Gil Mania jewel.
Dissidia Final Fantasy (2008) / Dissidia 012 Final Fantasy
The Beckoning Cat accessory boosts the gil earned from battle by 20%. When three pieces of gold equipment are worn, they activate the Glorious Gold combination, raising the gil earned in battle by 50%. Certain Calendar Bonuses increase the gil won, from 10% up to 100% depending on the level of the bonus. In Dissidia 012 only, the Qu'bia Tail accessory found only in the Labyrinth increases gil earned by 100%.
Gilfinder is a passive ability that increases the amount of gil obtained in battle. It can be used by Chocochick, Gigantuar, and Magic Jar.