Hi, I just did a quick search on Ancestry.com and found the following information about his enlistment.

Name: George I Trotter
Birth Year: 1919
Race: White, citizen
Nativity State or Country: Nebraska
State: Iowa
County or City: Guthrie

Enlistment Date: 1 May 1942
Enlistment State: Iowa
Enlistment City: Fort Des Moines
Branch: Branch Immaterial - Warrant Officers, USA
Branch Code: Branch Immaterial - Warrant Officers, USA
Grade: Private
Grade Code: Private
Term of Enlistment: Enlistment for the duration of the War or other emergency, plus six months, subject to the discretion of the President or otherwise according to law
Component: Army of the United States - includes the following: Voluntary enlistments effective December 8, 1941 and thereafter; One year enlistments of National Guardsman whose State enlistment expires while in the Federal Service; Officers appointed in the Army of
Source: Civil Life

Education: 4 years of high school
Civil Occupation: Engineering Aide (Designated Field) or Sales Clerk
Marital Status: Married
Height: 72
Weight: 182

Hope that helps some.
Jennifer