The Manual
« Section 7 »
7.1 Accessing GlotPress
By default, GlotPress is accessed via <home_url>/glotpress
unless you have configured it differently during your installation. If your permalink structure has a trailing slash on it you will need to add that as well.
The default home page is the projects page (the url is actually /glotpress/projects). From here you will be able to create a new project to use.