Design and develop google calendar into web page

We are a service company. We visit clients regularly and require an ability to coordinate visits. Our mail/calendar etc is with Google. The project is to: - recommend best practice to use Google calendar to coordinate visits among multiple clients and techs. - provide embedded code for calendar displays - Complete list - All techs and customers - Single tech list - Single customer list - The list will have to fit into a "widget" as defined by the support software zendesk. You can get a trial account for free to test out. - To select the agent or customer the zendesk software can deliver name or even a stored ID - The formatting and style will match the overall look and feel of zendesk - The details of the calendar event will be available via pointer hover-over and a click through - The code will me implemented relying on google api without additional DB, storage, etc. - Zendesk has an API that can be utilized if needed