stage 3

I got this information from http://www.cancure.org/colon_cancer.htm
it explains the different stages. G is stage 3

Stage 0 or carcinoma in situ is very early cancer - found only in the innermost lining of the colon.Stage I - The cancer has spread beyond the innermost lining of the colon to the second and third layers and involves the inside wall of the colon, but has not spread to the outer wall of the colon or outside the colon. Sometimes called Dukes A colon cancer.Stage II: Cancer has spread outside the colon to nearby tissue, but it has not gone into the lymph nodes. Sometimes called Dukes B colon cancer.Stage III: Cancer has spread to nearby lymph nodes, but it has not spread to other parts of the body. Sometimes called Dukes C colon cancer.Stage IV: Cancer has spread to other parts of the body, such as the liver, bones, or lungs. Sometimes called Dukes D colon cancer.