Does github GraphQL implement http get?

A lot of GraphQL providers expect http post from the http graphql client.
In the below document it looks like githubs implementations prefers http post
https://docs.github.com/en/graphql/guides/forming-calls-with-graphql

How about something like
https://api.github.com/graphql?oauth=bearer_token&query={query{viewer{login}}}

Preferable parts of graphql is public so that authorization could be obsolete.

The GraphQL Foundation recommends that a graphql server can handle POST and GET requests.