I run a web hosting service and have experience installing all sorts of software.
The instructions are a bit dated, so I might have to improvise, but if this will work on your server, I will make it work.
This job requires root, so this needs to be a VPS/Dedicated box for this to work.
According to the instruction, Ocelot(along with some other software) is a requirement for Gazelle.
I've not set up a private tracker before, but I'll get it going.
Please note I'm a system admin, so I can get this up and running, but any HTML design/PHP modifications etc needs to be done by a developer.