You Do Need power plug adapter while traveling from French Guiana to North Cyprus.

Here is Why You Need An Adapter

The outlet and plug type used in North Cyprus is G and in French Guiana are C, D and E. This is how they look like.

French Guiana

In French Guiana, outlets of type C, D and E are in use.

Type C

Type D

Type E

North Cyprus

In North Cyprus, outlets of type G are in use.

Type G