There is no rule requiring that sequencing; the two tracks run independently, so timing should be decided based on the applicant's own circumstances rather than an assumed dependency between them.
The two tracks do not need to be sequenced against each other
Because the Gold Card program and an employment-based immigrant petition are separate mechanisms with their own independent timelines, there is no requirement to wait for a decision on one before pursuing the other. An applicant deciding on timing should instead focus on the Gold Card program's own current terms, confirmed on the official page, and on their own readiness to commit the gift and processing fee, rather than assuming the employment-based petition needs to resolve first. That said, applicants should avoid treating either track's timing as a reason to rush a decision on the other; each filing should be paced according to its own requirements and the applicant's own confirmed eligibility, not according to a false sense that one track is racing the other toward the same outcome.