Port PR from PBS-Go: Older devices are sending gpc: 1 and this can't marshal.

[cross-repo-issue-creation]

A PR was merged over on PBS-Go

• Older devices are sending "gpc": 1 and this can't marshal. prebid-server#4070
• timestamp: 2024-12-13T19:25:40Z

[AntoxaAntoxic]

Works as expected. Closed.