You probably have to do it by hand.

Untested:

var scrollPosition : Vector2;

function OnGUI()
{
    scrollPosition = EditorGUILayout.BeginScrollView(scrollPosition);

        foreach( GameObject go in myGameObjectArray )
        {
              go = EditorGUILayout.ObjectField( go.name, go, typeof( GameObject ) );
        } 

    EditorGUILayout.EndScrollView();
}

You might be able to set up something with a Foldout object to make it collapsable, as well as maybe putting an int field there to resize your array. But that's the path I would suggest going down.

try this:

SerializedObject m_Object;
SerializedProperty m_Property;

void OnEnable() {
    m_Object = new SerializedObject(target);
}

public override void OnInspectorGUI() {
    m_Property = m_Object.FindProperty("NAMEOFARRAY");
    EditorGUILayout.BeginVertical();
    do {
      if (m_Property.propertyPath != "NAMEOFARRAY" && !m_Property.propertyPath.StartsWith("NAMEOFARRAY" + ".") ) {
          break;
      }  
      EditorGUILayout.PropertyField(m_Property);
    } while (m_Property.NextVisible(true));
    EditorGUILayout.EndVertical();

    // Apply the property, handle undo
    m_Object.ApplyModifiedProperties();
    //DrawDefaultInspector();
}