Gns3 IOS image of Cisco 1700 series:
You can download 1700 series router IOS for Gns3 from here and can use it for your GNS3 for performing different gns3 labs for learning purposes.
The Cisco 1700 Series Modular Access Router are ideal for LAN and small networks, you can build a fast, reliable, and secure Internet and network access through these routers.
Please notes that you can use these IOS Image only in Gns3 topologies, in other scenarios these images may not work.
IF this not work for you then you can try the following one...!