4 CFR §21.11

1. (a)A protester must immediately advise GAO of any court proceeding which involves the subject matter of a pending protest and must file copies of all relevant court documents.
2. (b)GAO will dismiss any case where the matter involved is the subject of litigation before, or has been decided on the merits by, a court of competent jurisdiction. GAO may, at the request of a court, issue an advisory opinion on a bid protest issue that is before the court. In these cases, unless a different schedule is established, the times provided in this part for filing the agency report (§ 21.3(c)), filing comments on the report (§ 21.3(i)), holding a hearing and filing comments (§ 21.7), and issuing a decision (§ 21.9) shall apply.