I just learnt about GCP Composer and am trying to move the DAGs from my local airflow instance to cloud and had a couple of questions about the transition. 

In local instance I used HiveOperator to read data from hive and create tables and write it back into hive. If I had to do this in GCP how would this be possible? Would I have to upload my data to Google Bucket and does the HiveOperator work in GCP?
I have a DAG which uses sensor to check if another DAG is complete, is that possible on Composer?
Composer have connection store. See menu Admin--> Connection. Check connection type available.
Sensors are available.
Creating Airflow DAGs on GCP Composer