I'm not sure what the correct verbiage is for this question, but here it goes.
I want to set up two web applications. One is based on golang and the other is apache/php (wordpress)
These applications will be hosted as separate google cloud platform API engines.
I would like these to be published under the same domain, so for example the main golang app URL would be www.mygolangapp.com and the wordpress url would be www.mygolangapp.com/blog
I'm thinking I may need to setup a google VPC network. Could anyone confirm this, and/or provide better options?
The choice of options depends on which compute system you are using:
Google App Engine - GAE has build in request routing which allows you to have different URLs served by different "modules" or "versions".
Google Compute Engine - on GCE you can use Cloud HTTP Load Balancing to do Content-Based Load Balancing to send different paths to different instance groups.
Google Container Engine - on GKE you can create an Ingress with fanout, to send different paths to different pods.