No way to do this from terminal I believe.
Initializing a repo needs to be done on website.
https://gitlab.com/projects/new#blank_project
Go to settings > repository
Protected Branches > Allow force push
Now, open your terminal. cd into your repo with the .git file, and type the following:
git remote add origin https://gitlab.com/Yoshixi/yourreponame.git
git branch -M main
git push -uf origin main
Gitlab will log you in via browser or ssh, use either. And then your local repo files will be on gitlab. good to go.