The GLR225 manual is available from Bosch Power Tools using the website's Chat feature or by calling support at 877-267-2499. The manual is not available as a direct link from the website, as of 2015.
From anywhere on the Bosch Power Tools website, click the Chat drop-down menu located near the top of the page. When connected, provide the request to the support person. Delivery options as of 2015 include receiving an emailed pdf or a mailed hard copy.
When using the electronic version, saving the diagrams as individual files makes it easier to cross-reference the instructions to the numbered parts of the drawings.