Copied from genymotion website
https://www.genymotion.com/faq/#google-play-services
For intellectual property reasons, Google Play Services are not included by default in Genymotion virtual devices. However, if you really need them, you can use the packages provided by OpenGapps. Simply follow these steps:
http://opengapps.org/#downloadsection
1. Visit opengapps.org
2. Select x86 as platform
3. Choose the Android version corresponding to your virtual device
4. Select nano as variant
5. Download the zip file
6. Drag & Drop the zip installer in new Genymotion virtual device (2.7.2 and above only)
7. Follow the pop-up instructions