How good is my chance of being admitted to McGill? (Class 2020, US Graduate)

McGill is where I want to go to college. It is my top choice by far. McGill has yet to give information on their admissions minima for the incoming class this year; I believe those are released in September.

McGill is strictly GPA and SAT/ACT for admissions

I’m very fond of their admissions policy - no essay or any subjectivity at all.

Here are my stats:

ACT: June 2018 Administration (End of Sophomore year)
English - 36
Math - 30
Reading - 28

Science - 31

Composite: 31

ACT: June 2019 Administration (End of Junior year)
English - 35
Math - 30
Reading - 30

Science - 32

Composite: 32

They look at individual section scores on both tests.
ACT Superscore: 32

SAT Superscores: 1440, (730EBRW, 710MATH)

GPA:
Sophomore Year: 4.0 (A both semesters in English)
Junior Year: 3.81 (A-, A in English)
(Counting academic classes only)
What are my chances for the Faculty of Arts?

Your chances for the Arts are excellent. I would caution you that McGill does pay attention to course rigor. Taking AP courses does carry some weight with admissions.