Was Eikichi Onizuka a soldier in GTO?

No, I've been playing since junior high school, and I've been playing until high school ... and then I went to college, and I graduated as a teacher. ....

The only regret is that I didn't draw it in college.

GTO is the abbreviation of English,,, which means to greet Mr. Onituka,, and the last O is the Roman phonetic symbol of Japanese,,,