AWS Step Functions - is there such a solution for Google Cloud Platform?

At the moment I am investigating the possibility and the proper way of migrating complex web applications from AWS to GCP. There is actually no issues with mapping general compute and networking services from one provider to another, but I wonder if GCP has a service similar to AWS Step Functions? I've already taken a look at Google Dataflow and Google Cloud Tasks. The second one seems to be something like that, but I am not sure if it's the optimal solution.

So the question is what service from google provides same functionality as AWS Step Functions? And if there is no such - then combination of which services would you recommend to achieve effective orchestration of distributed tasks (primarily cloud functions). Thanks!