I believe the soldier buried in Baltimore is George W. Givens, 28th Virginia Infantry. I have been unable to locate the Hollywood Cemetery record nor the findagrave.com you reference.

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George H. Givens

Residence was not listed;
Enlisted as a Private (date unknown).
VA 25th Infantry (No further record)
died 5/18/1918 in Baltimore, MD
Buried: Loudon Park Cemetery, Baltimore, MD

Sources used by Historical Data Systems, Inc.:
- The Virginia Regimental Histories Series

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Confederate Graves, Union Cemeteries
List of Confederate soldiers, etc., who, while prisoners of war, died at For McHenry and Baltimore, Md., and are now buried in the Confederate Lot, Loudon Park Cemetery, or in the Loudon Park National Cemetery

Givens, George H. __Company, 25th Virginia [assume Loudon Park Cemetery]

http://ufdc.ufl.edu/UF00047837/00003/39x?search=george+h.+givens

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Note, there is no G. Givens recorded in the rosters of either the 25th Virginia Regiment or Battalion in the Fold.3 Compiled Service Records

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George W. Givens

Enlisted on 5/15/1861 at Craig, VA as a Private.
On 5/15/1861 he mustered into "B" Co. VA 28th Infantry
He died of wounds on 5/17/1862 at Baltimore, MD
* POW 5/5/1862 Williamsburg, VA
* Wounded 5/5/1862 Williamsburg, VA (Shot)
* Confined 5/9/1862 Baltimore, MD

Sources used by Historical Data Systems, Inc.:
- The Virginia Regimental Histories Series

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George W. Givens, Private, Company B, 28th Virginia Infantry, enlisted May 15, 1861 at Craig C. H. by Capt. N. C. Wilson for one year, wounded at Williamsburg May 5, 1862 and taken prisoner same date, admitted U. S. A. General Hospital, Camden Street, Baltimore, Md. May 11, 1862, gun shot wound, died May 17, 1862

Compiled Service Records of Confederate Soldiers Who Served in Organizations from the State of Virginia