Gilbert de Gant, son of Baldwin, Earl of Flanders, by Maud, sister of William the Conqueror, accompanied his uncle into England and, participating in the triumph of Hastings, obtained a grant of the lands of a Danish proprietor named Tour, with numerous other lordships. This Gilbert happened to be at York, anno 1069, and had a narrow escape when the Danes in great force, on behalf of Edgar Etheling, entered the mouth of the Humber and, marching upon that city, committed lamentable destruction by fire and sword, there being more than 3,000 Normans slain. Like most of the great lords of his time, Gilbert de Gant disgorged to the church a part of the spoil which he had seized, and amongst other acts of piety restored Bardney Abbey, co. Lincoln, which had been utterly destroyed many years before by the Pagan Danes, Inquar and Hubba. He m, Alice, dau. of Hugh de Montfort, and had issue, Hugh, who assumed the name Montfort; Walter, his successor; Robert, Lord Chancellor of England, anno 1153; and Emma, m. to Alan, Lord Percy. This great feudal chief d. in the reign of William Rufus. [Sir Bernard Burke, Dormant, Abeyant, Forfeited, and Extinct Peerages, Burke's Peerage, Ltd., London, 1883, p. 227, Gant, Earls of Lincoln]
Note: Maud was not a sister, but wife of William the Conqueror; Baldwin VI was her brother, while Baldwin V was her father. The two Baldwins were Counts not Earls of Flanders. Earl is an English term not used on the continent. I do not agree with the above parentage for Gilbert in any case.
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Emma, daughter of Gilbert de Gant (himself son of Baldwin, Count of Flanders, and nephew of Queen Matilda or Maud, wife of William I The Conqueror) by Gilbert's wife Alice, herself daughter of Hugh de Montfort. [Burke's Peerage]
Note: I do not agree with the above parentage for Gilbert.
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More Important NOTE: Ancestral Roots, in a revised lineage for the 7th edition, states that Gilbert's parents are Gisele (or Gisla) of Luxembourg and Rudolph I of Aalst (or Alost) (also called Ralph de Gand or Ghent). Whoever AR had as parents of Gilbert in prior editions had been removed based on new evidence. I will go with AR.
Gilbert de Gant (Gaunt or Ghent), d. c 1095, buried Bardney, probably arrived in England in 1066; was a commander in York 1068, and was taken prisoner there by the Danes in 1069. He was a tenant-in-chief and one of the largest landholders in co. Lincoln in 1086. Folkingham being the head of his barony; m. Alice de Montfort, daughter of Count Hugh de Montfort-sur-Risle. [Ancestral Roots]