Generally, what is gateway wait threshold? (the time it waits for a response before an error is thrown).
I presume you're referring to a routing assertion where the Gateway routes a request to a backend and expects a response back, is that correct? If so, then documentation on connection properties and their defaults are all here for your reference: https://docops.ca.com/ca-api-gateway/9-3/en/policy-assertions/assertion-palette/message-routing-assertions/route-via-http-s-assertion#RouteviaHTTP(S)Assertion-Configuringthe[Connection]Tab
In particular, if it is indeed the routing assertion you were referring to, then the "read timeout” is the one you're looking for.