How would I reference an image taken from Google Maps in APA?

Because dynamically created maps do not have a title, you should describe the map in square brackets and also include a retrieval date because the page could change over time. 

Example

Parenthetical citations: (Google, n.d.)

Narrative citations: Google (n.d.)

Reference List:

Google. (n.d.). [Google Maps directions for driving from Ingolstadt, Germany, to Geneva, Switzerland]. Retrieved August 4, 2015, from https://goo.gl/maps/ILt8