Q:

Replace nginx ingresses with API gateway ambassador

i am looking forward to replacing my Nginx ingress with ambassador API gateway with minimal changes is it possible ?
what is difference between Ambassador Edge Stack & Ambassador API gateway i have followed this document and found configuration AES in helm chart.
https://www.getambassador.io/docs/latest/topics/install/install-ambassador-oss/

A:

It is possible, sure. 
According to [1] the difference between Ambassador Edge Stack & Ambassador API gateway is the number of features. Edge Stack seems to pack more features together. Check the link for details.
This should help too [2]
[1] https://www.getambassador.io/docs/latest/tutorials/getting-started/
[2] https://cloud.google.com/solutions/exposing-grpc-services-on-gke-using-envoy-proxy#alternative_ways_to_route_grpc_traffic

