This is a simple procedure how one can create gh-pages branch on newly created repository

create_gh-pages-branch

# Github's web hosting looks for a branch called "gh-pages"
# Git by names the default branch "master" so we must rename
# it to "gh-pages" so that Github can find the website files.

# In terminal/cmd
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mkdir YOUR_REPO.github.com
cd YOUR_REPO.github.com
echo "# hello Sanzhar" >> README.md
git init
git checkout -b gh-pages  
git add README.md
git commit -m "first commit"
git remote add origin https://github.com/YOUR-USER/YOUR-REPO.git
git push origin gh-pages  
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# Now if you check on github you should only leave with gh-pages branch
Settings (Repo settings) --> Branches --> Default Branch --> gh-pages --> Update