Yes, Guinea-Bissau is further west than the prime meridian (zero degrees latitude). The midpoint of Guinea-Bissau is further west by approximately 1,000 miles (1,609km).
No, Guinea-Bissau is not further east than the prime meridian (zero degrees latitude).
Yes, Guinea-Bissau is further north than the equator. The midpoint of Guinea-Bissau is further north by approximately 815 miles (1,312km).
No, Guinea-Bissau is not further south than the equator.