There is no registration required to read this wiki or download and install Gramps. You only need an account to edit this wiki.
Gramps did, for many years, provide a free hosting service for people to post family trees...
Sadly, with the change to a new hosting service, we are no longer able to provide the service.
There are a number of free hosting services that you could use - contact the gramps-users list and you'll get some good advice.