You Do Need power plug adapter while traveling from Myanmar (Burma) 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 Myanmar (Burma) are A, C, D, G and I. This is how they look like.

Myanmar (Burma)

In Myanmar (Burma), outlets of type A, C, D, G and I are in use.

Type A

Type C

Type D

Type G

Type I

Guyana

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

Type A

Type B

Type D

Type G