I'm a new Karateka, practicing Chinese Goju Ryu and I'm working on my 8 point blocking system.
I'm hoping that someone can give me an opinion of my form.
(Constructive answers and comments only please)
As already has been stated, your question asks for opinions, and is vague and not very well suited for this forum.
I watched your video, and would say that firstly, your hikite should be on the side of your body, not under your breast. Secondly, your gedan harai uke is too linear, and should be a movement where you start with your fist up, forearm perpendicular to the floor, upper arm parallel to the floor, move your elbow in front of your body, and swing forearm and fist (ken) down, stopping in front of your thigh, with a fist width from thigh to fist.
The next advice I have for you is to ask a sempai / your sensei to show you, and if you want to practice for yourself, ask permission to film them, then film yourself, and compare.