What should I import for GLKVector2 in Swift?

Question

I have the follow code:

func CGPointFromGLKVector2(vector : GLKVector2) -> CGPoint {
    return CGPointMake(vector.x, vector.y)
}

The error message is:

Use of undeclared type 'CGPoint'

After I import SpriteKit, I got:

Use of module 'GLKVector2' as a type

What should I do next? I can't find any related information in document. Thanks

NOTE:

I actually want to covert the following function C(objC) code into Swift:

static __inline__ CGPoint CGPointFromGLKVector2(GLKVector2 vector) {
    return CGPointMake(vector.x, vector.y);
}