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

Here is Why You Need An Adapter

The outlet and plug type used in Palestine are C and H and in Guyana are A, B, D and G. This is how they look like.

Guyana

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

Type A

Type B

Type D

Type G

Palestine

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

Type C

Type H