EXHIBIT 3.261

CERTIFICATE OF FORMATION
OF
GRMC HOLDINGS, LLC

Under Section 18-201 of the
Delaware Limited Liability Company Act

FIRST: The name of the limited liability company is GRMC Holdings, LLC (the “Company”).

SECOND: The address of the registered office of the Company in the State of Delaware is 2711 Centerville Road, Suite 400, Wilmington, Delaware 19808, County of New Castle.

THIRD: The name and address of the registered agent for service process on the Company in the State of Delaware is Corporation Service Company, 2711 Centerville Road, Suite 400, Wilmington, Delaware 19808, County of New Castle.

IN WITNESS WHEREOF, the undersigned has executed this Certificate of Formation as of December 20, 2006.

/s/ Rebecca Hurley
Title: Authorized Person

State of Delaware
Secretary of State
Division of Corporations
Delivered 03:51 PM 12/20/2006
FILED 03:51 PM 12/20/2006
SRV 061170309 — 4272335 FILE