A gastric duplication cyst (GDC) is a type of enteric duplication cyst. It can co-exist with an ectopic tissue. This was a female toddler with a GDC at the greater curvature. An abdominal ultrasound and a contrast-enhanced computed tomogram suggested the cyst. She had laparotomy, complete cyst and partial gastric excision with the removal of extragastric pancreatic tissue. The histology report came out as a cyst with associated intracystic and an extracystic pancreatic tissue. She made a clinical improvement. GDC can be associated with both intracystic and extracystic ectopic pancreatic tissues. This should be kept in mind when choosing the modality of treatment.