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

Here is Why You Need An Adapter

The outlet and plug type used in Guyana are A, B, D and G 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

Guyana

In Guyana, outlets of type A, B, D and G are in use.

Type A

Type B

Type D

Type G