Calling other methods error CS0119

I have two scripts named Gravity and Planet and I keep getting the error

Assets/Gravity.cs(41,35): error CS0119: Expression denotes a method group', where a variable’, value' or type’ was expected

using UnityEngine;
using System.Collections;

public class Gravity : MonoBehaviour {
    public Rigidbody rb;
    //Holds the Vector3 for gravity
    Vector3 gravity;
    //Holds all GameObjects in the scene with the tag of Targetable.
    GameObject [] targetable;
    //The closest GameObject
    public GameObject targeted;
    // Use this for initialization
    // Used to calculate which GameObject is closer.
    public float minDist;
    public float dist = 0;
    // Use this for initialization
    void Start () {
        rb = GetComponent<Rigidbody>();
    }
   
    // Update is called once per frame
    void Update () {
        //Fills the array with GameObjects
        targetable = GameObject.FindGameObjectsWithTag ("HasGravity");
       
        foreach (GameObject target in targetable) {
            //Stores the shortest distance and sets "targeted" to the shortest distance.
            dist = Vector3.Distance (transform.position, target.transform.position);
           
            //checks to see which is closer
            if (dist < minDist) {
                minDist = dist;
                targeted = target;
               
            } else if (minDist == 0) {
                targeted = target;
                minDist = dist;
            }
        }
        //Get the Vector3 for gravity based on current position
        gravity =targeted.GetComponent<Planet>.GravityType(transform.position);
    }
using UnityEngine;
using System.Collections;


public class Planet : MonoBehaviour {
    public enum Planetary{BasicPlanet, DiskPlanet, Hallow, Tube};
    public float GravityWell;
    public float GravityStrength;
    public Planetary PlanetType;
    // Use this for initialization
    void Start () {
   
    }
   
    // Update is called once per frame
    void Update () {
       
    }

    public Vector3 GravityType(Vector3 playerPos){
        Vector3 gravityDirection;
       
        switch (PlanetType){
        case Planetary.BasicPlanet:
            gravityDirection = playerPos - transform.position;
            return gravityDirection;
            break;
       
        default:
            return new Vector3 (0,0,0);
        }
    }
}

I am trying to call the method “GravityType” from the planet script in the Gravity script.

GetComponent()

you’re missing the () which denotes a thing as a method/function… hence the error about a function name as a variable.