Here is just a little more information re your grandfather, Carl G. Hall.
From World War II Enlistment Records 1938-1946
Carl G. Hall, enlisted 16 Sep 1940, in Wagoner Co. OK Birth date: 1917 (no exact date given) Education, two years h.s. Married Occupation, unskilled mechanics and repairmen Private, Infantry, National Guard
And this marriage record:
Carl G. Hall m. Rena Mae Watt, 1/11/1942, Wagoner Co. OK.
The only Rena Mae Watt that I could find that might be a possibility was Rena Mae Watt, b. 1/7/1919 in Adair Co. OK.Adair County is very near Wagoner Co.This Rena Mae was Indian, Cherokee tribe. However, when she died in California she had the last name Sundbom.
I have not found a Social Security Death Index entry that I felt I could identify as your grandfather.Since you have not mentioned it,I assume you do not know when or where he died.