Need clarity on lifecycles for UIViewController and SKScene

Code Block 
class GameViewController: UIViewController {
    override func viewDidLoad() {
        super.viewDidLoad()
        #if DEBUG
            print ("GVC viewDidLoad")
        #endif
        
        ... create myView (as an SKView) 
        ... add it as a subview of GameViewController
        ... use myView to get constraints
				... and set other properties
        myView.isHidden             = false
        myView.ignoresSiblingOrder    = true
        myView.showsFPS               = true
        myView.showsNodeCount         = true
        myView.showsPhysics           = true
    }
    override func viewWillLayoutSubviews() {
        super.viewWillLayoutSubviews()
        #if DEBUG
            print ("GVC viewWillLayoutSubviews")
        #endif
    }
     func viewDidAppear() {
        super.viewDidAppear(true)
        #if DEBUG
            print ("GVC viewDidAppear")
        #endif
    }
    override func viewDidLayoutSubviews() {
        super.viewDidLayoutSubviews()
        #if DEBUG
            print ("GVC viewDidLayoutSubviews START")
        #endif
        ... get the view.frame
        ... record some properties in my global variables        
        
		... launch GameScene here
        if myGlobalVars.gameScene == nil {
            let scene = GameScene(size: myView.frame.size )
            scene.anchorPoint = CGPoint(x: 0.0, y: 0.0)
            scene.backgroundColor   = .clear
            scene.scaleMode         = .aspectFit
            myGlobalVars.gameScene = scene
            myView.presentScene(scene)
        }
        #if DEBUG
            print ("GVC viewDidLayoutSubviews END")
        #endif        
    }
    
    override var shouldAutorotate: Bool {
        return false
    }
    override var supportedInterfaceOrientations: UIInterfaceOrientationMask {
        if UIDevice.current.userInterfaceIdiom == .phone {
            return .portraitUpsideDown
        } else {
            return .all
        }
    }
    override var prefersStatusBarHidden: Bool {
        return false
    }
}

Code Block 
class GameScene: SKScene, SKPhysicsContactDelegate {
    override func sceneDidLoad(){
        super.sceneDidLoad()
        #if DEBUG
            print ("GC sceneDidLoad")
        #endif
    }
    
    override func didMove(to view: SKView){
        super.didMove(to: view)
        #if DEBUG
            print ("GC didMove START")
        #endif
        ... load background image
        physicsWorld.contactDelegate = self
        
        ... create just one SKSpriteNode
        createGems(myGemRef: &myGems)
        #if DEBUG
            print ("GC didMove END")
        #endif
    }
}

GVC viewDidLoad
GVC viewWillLayoutSubviews
GVC viewDidLayoutSubviews START
GC sceneDidLoad
GC didMove START
SKNode create SKSPriteNode start
SKNode create SKSPriteNode end
GC didMove END
GVC viewDidLayoutSubviews END