Gastric stimulation devices, systems and methods are provided, particularly for stimulating a gastric organ having an internal cavity. Such devices and systems are typically implanted outside of the gastric organ while the environment of the internal cavity is probed and monitored by one or more sensors. The sensor information may be used to affect the stimulation signals provided to the gastric organ by the devices and systems. Such feedback integration assists in providing treatments and stimulation programs that are tailored to the needs of the individual patient.