You Do Need power plug adapter while traveling from Gaza Strip to Saint Barthélemy.

Here is Why You Need An Adapter

The outlet and plug type used in Saint Barthélemy are C and E and in Gaza Strip are C and H. This is how they look like.

Gaza Strip

In Gaza Strip, outlets of type C and H are in use.

Type C

Type H

Saint Barthélemy

In Saint Barthélemy, outlets of type C and E are in use.

Type C

Type E