Based on 30 Glassdoor salary reports, Technical Project Managers at Google earn about $273K - $446K in total pay. Base pay lands around $166K - $245K, with bonus and stock pushing compensation much higher.
There are also 579 open technical project manager jobs on Glassdoor tied to your search, so this is a strong market. You can narrow things down by pay, company, or remote/on-site status.