Housing advertisements make up a large proportion of the «Amtsblatt des Kantons Zug» (the official Zug Gazette) which can be bought at every «Kiosk».

On the web you can also find various sites such as:

www.amtsblatt.ch
www.homegate.ch
www.immoscout.ch
www.newhome.ch

You may decide to use the services of an estate agent or relocation agent to help you find the right property you need. However, these services are usually subject to a fee.

Link to list of relocation agents.