Yes pretty much, although I've modified the addon myself to work for 3.3.5a, since there was no 3.3.5a version of the addon, as well as a lot of additions such as more spells, target & focus only option, chat alerts, enemy debuff alerts, etc.
There was no 4.0.6a version of GladiatorLosSA either, so I ported my 3.3.5a addon over to 4.0.6a and got everything to work there. I've never really meant to have it work for 4.3.4, but I might as well add it since it's a lot more extensive in terms of features than GladiatorLosSA .
You need to extract the zip folder to your wow folder/interface/addons/