Does GLoSS contain any spyware/adware/etc?
Absolutely not. GLoSS exists simply to download and display images on your computer from the Gallery2 installation that you configure it to use. Therefore GLoSS will only use the internet to communicate with webservers that you tell it to. The single exception to this is the simple version check that GLoSS performs on startup, when it will check the latest available version number of GLoSS from the GLoSS website at http://gloss.ildica.com/. GLoSS does not send any identifiable information to the GLoSS website during this process; it simply asks what the latest available version number is. GLoSS is purely supported by PayPal donations.