You are downloading the gCalendar XAP file v126.96.36.199 for Windows Phone. gCalendar is a free and useful Business app: Manage your google calendar online now!!!Slide between days/months and add/modify/delete your appointments.v1.1.1- fix new ... You can now download the offline XAP file to install & try it.
Download Locations for gCalendar 188.8.131.52 XAP file
Note: To install it manually from an SD card, you should choose one of the server location above to get the offline gCalendar XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.