You Do Need power plug adapter while traveling from Gabon to Bangladesh.

Here is Why You Need An Adapter

The outlet and plug type used in Bangladesh are A, C, D, G and K and in Gabon is C. This is how they look like.

Gabon

In Gabon, outlets of type C are in use.

Type C

Bangladesh

In Bangladesh, outlets of type A, C, D, G and K are in use.

Type A

Type C

Type D

Type G

Type K