This is not really ready for anyone to look at manually quite yet.

First, (re)generate the training.asd file if necessary (only needed if files were added/removed/renamed):

(cl-lite ".../path/to/training/" :create-asd-file? t)

Next, set up Quicklisp (this can be in your gdlinit.cl):

(load-quicklisp)
(pushnew ".../path/to/training/" ql:*local-project-directories*)
(ql:quickload :training)

To visit the toplevel you can go to

http://localhost:9000/gendl-self-start-backdoor

or to any of the tutorial sets with e.g.

http://localhost:9000/t2-backdoor