lambda-go-api-proxy makes it easy to port APIs written with Go frameworks such as Gin (https://gin-gonic.github.io/gin/ ) to AWS Lambda and Amazon API Gateway.
We haven't added support for multivalue headers and query strings yet. It's on my TODO list. I hope to get to it by mid-Feb. Obviously PRs are very welcome.
Multi value query string params are disregarded. Or I’m I missing something? https://github.com/awslabs/aws-lambda-go-api-proxy/blob/master/core/request.go#L121-L132