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

Here is Why You Need An Adapter

The outlet and plug type used in Philippines are A, B and C and in Gabon is C. This is how they look like.

Gabon

In Gabon, outlets of type C are in use.

Type C

Philippines

In Philippines, outlets of type A, B and C are in use.

Type A

Type B

Type C