You Do Need power plug adapter while traveling from Grenada to Maldives.

Here is Why You Need An Adapter

The outlet and plug type used in Maldives are C, D, G, J, K and L and in Grenada is G. This is how they look like.

Grenada

In Grenada, outlets of type G are in use.

Type G

Maldives

In Maldives, outlets of type C, D, G, J, K and L are in use.

Type C

Type D

Type G

Type J

Type K

Type L