You are downloading the GDocs XAP file v18.104.22.168 for Windows Phone. GDocs is a free and useful Productivity app: GDocs is a simple client for Google docs and Google Drive for windows phone. Currently it supports:* Viewing documents, spreadsheets, drawings ... You can now download the offline XAP file to install & try it.
Download Locations for GDocs 22.214.171.124 XAP file
Important Notice: Now Due To Unspecified Limitations, You Can Not Use The Offline XAP File To Install It Any More.
To try to install it manually from an SD card, you should choose one of the server location above to get the offline GDocs XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.