In early 1963 , the United States refused to renew his passport , so he made the symbolic gesture of becoming a citizen of Ghana .
In early 1963 , the United States refused to renew his passport , so he decided to become a citizen of Ghana .
González went back home in 1985 and enrolled , studied at the Humacao campus of the University of Puerto Rico to study physics and electronics , earning his Bachelors of Science degree in 1988 .