First You need to open the ports of your instance through GCP Control Panel (Shown in the video)
Setting Up Root Password (There is no default password of VM Instance in GCP)
sudo -i
sudo bash
sudo passwd root

Enable Root Login
sudo nano /etc/ssh/sshd_config
PermitRootLogin yes
PasswordAuthentication yes

sudo systemctl restart sshd

Disabling Firewall
sudo ufw disable

Installing Apache

sudo apt update
sudo apt install apache2

Open IP and See if apache is working

Installing MySQL
sudo apt install mysql-server
sudo mysql_secure_installation

Allow Remote Login
sudo nano /etc/mysql/mysql.conf.d/mysqld.cnf

change localhost ip to 0.0.0.0
sudo systemctl restart mysql

creating new user in mysql
mysql -u root -p
CREATE USER 'newuser'@'%' IDENTIFIED BY 'password';
GRANT ALL PRIVILEGES ON * . * TO 'newuser'@'%';
FLUSH PRIVILEGES;
exit

Now, you may test the mysql connection

Hosting FiveM
mkdir ~/fivem_server
cd ~/fivem_server

wget LINK (Reference)

tar -xvf fx.tar.xz
rm fx.tar.xz --DELETERARFILE

git clone https://github.com/citizenfx/cfx-server-data ~/fivem_resources
nano ~/fivem_resources/server.cfg

copy server cfg (Reference)
ctrl o

screen -s "FiveM server" bash ~/fivem_server/run.sh

Note:-
To switch screen (CTRL+A then D)
to shut down server, ctrl c
to switch screen screen -r