Xitami is a portable web server and does not need to be installed.
When you first extract the zip file after downloading, there are 92 files and 17 folders within the "app" folder. Everything is within that folder.
_xiopen%5F2%5F5%2Ezip~ -> xitami-25 -> app -> everything
To start the server you run an exe file named "xigui32". Your website goes in "webpages" folder that is in "app".
We are not "suppose" to install anything at the library. I have installed php on a computer there

, but i don't want to do to much and end up getting banned from being able to get on their computers. On my friends computers they probably wouldn't mind me installing Apache.
I didn't think about Xitami stops parsing right after the extension, I assumed that "$_get" was just being parsed wrong or not at all within the page.
Xitami allows filters for extensions.
for example:
when i set up php with Xitami i had to go to
http://localhost/admin -> log in -> Configuration -> Filters
then add
.php under "File extension" and c:\php\php.exe under "Filter command or script"
my point with this is "maybe" i have to add another filter for Xitami to parse further then just extension...
hmmm...
well, Thanks for bringing in another way to view the problem

. maybe trying a new filter would be better. Maybe add ".php?*"... hopefully * will act as a wild card.
even if adding a filter does not work, the idea you posted as what the problem could be sounds much more likely to be the problem that is happening.