There are two monuments to Battery G on the Gettysburg battlefield. The first is north of Gettysburg along Howard Avenue on Barlow’s Knoll (39.845527° N, 77.226128° W; Tour map: Howard Avenue East). The second is southeast of town in the National Cemetery (39.819985° N, 77.230655° W; Tour map: National Cemetery; see Google maps to both monuments)
Both monuments have identical tablets with the exception of the commanding officer listed. Lieutenant Wilkinson is listed as commander on the Barlow’s Knoll monument. He was mortally wounded north of town and when the battery redeployed on Cemetery Hill Lt. Bancroft was in command, and is on the monument in the National Cemetery.
From the monuments:
Army of the Potomac
Battery G Fourth U. S. Artillery
Six 12 Pounders
Lieut. Bayard Wilkinson commanding [or]
Lieut. Eugene A. Bancroft commanding
July 1 Arrived at Gettysburg about 11 a.m. Advanced and took position two sections on Barlow’s Knoll the left section detached near Almshouse. Engaged Confederate Infantry and artillery on right and left. Lieut. Wilkeson fell early mortally wounded and the command devolved on Lieut. Bancroft.
The sections were compelled to change positions several times. Retired about 4 p.m. one section relieving a section of Battery I 1st Ohio on Baltimore Street in covering the retreat. About 5 p.m. took position on Cemetery Hill.
July 2 Moved to rear of Cemetery facing Baltimore Pike. In action at the Cemetery from 4.30 p.m. until 7 p.m.
July 3 About 2 p.m. two sections were engaged in the Cemetery until the repulse o the Confederates.
Casualties: killed 1 officer and 1 man, wounded 11 men, missing, 4 men.
Ammunition expended 1400 rounds.
31 horses killed.
The battery is referenced on a marker at Antietam.