Provided is a canola variety designated PV 591 GCS and seed, plants andplant parts thereof produced from a cross of inbred varieties. Methods forproducinga canola variety comprise crossing canola variety PV 591 GCS with anothercanolaplant. Methods for producing a canola plant containing in its genetic materialone ormore traits introgressed into PV 591 GCS through backcross conversion and/ortransformation, and to the canola seed, plant and plant part produced therebyaredescribed. Canola variety PV 591 GCS, the seed, the plant produced from theseed,plant parts and variants, mutants, and minor modifications of canola varietyPV 591GCS are disclosed.
