Hi, I am just curious.
can our lovely framework support building desktop application, PHPGTK, maybe?
If I really undertand you, phpgtk is an extension and phalcon is extension.
if you install phalcon you can use it.
But why phalcon need it I really don't understand.
I do not develop any desktop app, but I think that so long that your desktop app can communicate to webserver (using http requests) it should be okay.
if found WXPHP from wxwidgets, that's an extention just like phalcon
and nice https://code.google.com/p/phpdesktop with cef and plays great with phalcon