Was Guinea renamed after gaining independence from Spain?

No, Guinea was not renamed after gaining independence from Spain. Guinea gained independence from France, not Spain. Guinea was known as French Guinea during its time as a French colony, and retained the name Guinea after gaining independence in 1958.

Which Guinea gained independence from Spain?

Equatorial Guinea gained independence from Spain in 1968. It was known as Spanish Guinea during the time it was a Spanish colony. After gaining independence, the country was renamed Equatorial Guinea.