If you search through the forum, you'll see that it is highly advisable to wait for the GCMS notes before reapplying. Is it possible to reapply without them and be approved? Sure, you'll also see this for yourself in the forum.
The thing is, the GCMS notes could have very valuable information as to what specific part of your application did not convince the officer. If you know this, your second application could have a higher chance of approval. Also, note that the GCMS notes take time (around 90 days currently). Lastly, it is also possible for your notes to don't contain very useful information but usually, they do.