This is probably what you already have but better twice than not at all. (SOURCE: Ancestry.com)

U.S. Civil War Soldiers, 1861-1865
about John G. Laning
Name: John G. Laning
Side: Union
Regiment State/Origin: Ohio
Regiment Name: 61 Ohio Infantry
Regiment Name Expanded: 61st Regiment, Ohio Infantry
COMPANY: H
Rank In: Sergeant
Rank In Expanded: Sergeant
Rank Out: Sergeant
Rank Out Expanded: Sergeant
Film Number: M552 roll 62

U.S. Civil War Soldiers, 1861-1865
about John G. Lining
Name: John G. Lining
Side: Union
Regiment State/Origin: Ohio
Regiment Name: 61 Ohio Infantry
Regiment Name Expanded: 61st Regiment, Ohio Infantry
COMPANY: H
Rank In: Sergeant
Rank In Expanded: Sergeant
Rank Out: Sergeant
Rank Out Expanded: Sergeant
Alternate Name: John G./Laning
Film Number: M552 roll 64

Can't tell if the John Laning below is same one listed above.

American Civil War Soldiers
about John Laning
Name: John Laning
Enlistment Date: 7 Feb 1862
Side Served: Union
State Served: Ohio
Service Record: Enlisted as a Private on 7 February 1862 at the age of 18.
Enlisted in Company H, 61st Infantry Regiment Ohio on 7 Feb 1862.
Promoted to Full Sergeant on 24 Apr 1862.
Transferred into Company H, 82nd OVI Regiment Ohio on 31 Mar 1865.
Transferred out of Company H, 61st Infantry Regiment Ohio on 31 Mar 1865.

American Civil War Soldiers
about John Laning
Name: John Laning
Enlistment Date: 7 Feb 1862
Side Served: Union
State Served: Ohio
Service Record: Enlisted as a Sergeant on 7 February 1862 at the age of 18.
Enlisted in Company H, 61st Infantry Regiment Ohio on 7 Feb 1862.
Transferred out of Company H, 61st Infantry Regiment Ohio on 31 Mar 1865.
Transferred into Company H, 82nd Infantry Regiment Ohio on 31 Mar 1865.
Mustered Out Company H, 82nd Infantry Regiment Ohio on 24 Jul 1865 at Louisville, KY.

Sources: 17