Google Cloud Platform (GCP) can be optimized for workloads by using performance benchmarking tools like PerfKit Benchmarker, which measures end-to-end time to provision resources in the cloud. The tool reports on standard peak performance metrics such as latency, throughput, time-to-complete, and IOPS. Additionally, reading benchmarking research from Cockroach Labs can help users make informed decisions when choosing a cloud provider. Evaluating workloads before configuring GCP is also important, as default configurations may not be ideal for all types of machines or workloads.