I have an iPod Touch 5th gen. Can I play Pokemon Go?

You can not play Pokemon GO on an iPod Touch 5G reliably.

As Pokemon GO requires players and their devices to provide the game with an accurate position (which WiFi triangulation does not), you will face frequent GPS errors.

In order to pull off positioning with WiFi reliably, you need to be in a very WiFi-heavy location (at least 10-11 networks with location data assigned). These, unfortunately, are not too common unless you live in a major metropolitan area.

You can use an iPod, I do, but you need Wifi or to be on someone's hotspot while you're out doing things. If it says "GPS Service not found" pull the screen down to where it shows stocks and things and it will update.

You can. You'll be having trouble opening the app but you can. The only thing is that the avatar doesn't move as you do.