Design a GCP solution to ingest global tracking sources, process and query in real time, and store data reliably for Flowlogistic's proprietary tracking software. Which product combination should you choose?

This combination effectively addresses the requirements. Cloud Pub/Sub is ideal for ingesting global, real-time streaming data from diverse tracking sources. Cloud Dataflow provides a fully managed, scalable service for real-time processing and analysis of this streaming data. Cloud Storage offers highly durable, scalable, and cost-effective storage for the processed data, suitable for reliable long-term retention and subsequent querying. Local SSD is not a suitable long-term storage solution; it's ephemeral and designed for high-performance temporary storage attached to VMs. Cloud SQL is a relational database, less suited for the high-throughput, unstructured or semi-structured nature of real-time tracking data compared to Cloud Storage, and might incur higher costs for this scale. Cloud Load Balancing is for distributing network traffic, not for data ingestion, processing, or storage in this context.