Gastro Retentive Drug Delivery System is one of the novel approach and all researchers in pharma industries are focused in the same. The main aim of writing this review on Gastro Retentive floating drug delivery systems is to assemble the recent literature with special emphasis on its principal mechanism of floatation to achieve gastric retention and its recent development. Floating systems are low density systems that has density lower than gastric fluid and floats over the gastric fluid and remains buoyant in the stomach without affecting the gastric emptying rate for a prolonged period of time. Floating dosage forms can be formulated as tablets, capsule. This review article includes detailed information about its classification, advantages and in-vitro evaluation parameters.