A general health check is not recommended in the Netherlands. This is because scientific evidence suggests that general health checks are unlikely to be beneficial and may cause harm. If you are concerned and still desire a general checkup discuss the matter with your GP.
Private providers offer all kind of health checks, but these are generally not covered by Dutch health insurance providers (because of the before mentioned reasons). You don’t need your GP’s consent for a health check. You can discuss any results that worry you with your GP.
Alternatively, you may also check with your employer as companies are required to offer their employees periodic health checks.