The proprietary name Promis (pronounced proh-MEESS) was created by the Gaja family to denote commitment, expectation, fulfillment, and hope. The promise of quality and the reward of diligence and excellence. The grapes are grown in the terre brune (rich, dark soils) which consist primarily of loam and clay.he proprietary name Promis (pronounced proh-MEESS) was created by the Gaja family to denote commitment, expectation, fulfillment, and hope. The promise of quality and the reward of diligence and excellence. The grapes are grown in the terre brune (rich, dark soils) which consist primarily of loam and clay.