PROBLEM Failure to install

[hameau]

.. not a 5 min install :-)

I regularly install GS in less than five minutes, but I know that my Apache and PHP settings work (same for a commercial hosting, most of the time).

The problem with installing Apache and PHP on a home server (especially on Debian) is that you can't stop at simply installing – there is a good deal of set-up to do before your basic working server becomes a properly configured server. Much of the configuration adjustment can be quite mysterious to someone not familiar with it. Minor changes have big effects.

So, before you point the finger at GS, try installing on commercial (even most free) hosting, where five minutes is easily achievable. Then wade through a few tutorials and man pages on Apache, PHP and related stuff and check your rpi configuration.

Nothing personal – I went through the same learning curve when I first tried being my own server administrator at home.