The spelling of the name from Gaulding to Gaulden/in occurred in the next generation, the children of John Matthew Gaulding. Son John, Jr. and son William have been set to merge into their EN or IN derivations. Further research is needed to determine the derivations or not, used by the rest of the children. Some are known to have kept the Gaulding spelling.
John Gaulding was born in New Kent County Virginia. This is proven in the birth, baptism and death records of the Parish. That John's Middle name was Mathew is something contentiously debated among researchers, but they all say that this baby Mathew is John Mathew Gaulding and that this John Mathew Gaulding Married Elizabeth Geers.
John Gaulding and Elizabeth Geers appear in court records seeking custody of Alexander Gaulding's Children.
"Freeman Lewelling, John Gaulding, Chas. Howall and James Foster, sev-
erally privates in late war between Great Britain and France, under command of Col. Wm. Byrd, and continued in service during their enlistments. Prince
Edward Co., Feby. Court, 1780." 
Appraisal of est. of John Gaulding by order of Court Oct. 1773. Appr. Richd. Morton, George Smith, Jno. Watson, Jr. Adm. Eliza. Gaulding. R. 15 Aug. 1774.
I am currently wrangling all of the research together and there is more to come M. Gaulden March 28, 2014.
↑ St. Peter's Church of New Kent County, Virginia, Parish Register,1680 to 1787, p. 13. "(John) Mathew daughter of Jno Galling Baptised Feb'y ye 9th, 170_). Scanned and transcribed by Christine Wertin. 
↑ 2.02.1 The Gaulden, Gauldin, Gaulding, Family History -- A Seven Hundred Year Study, Volume One, pp. 21, 28-30, Dr. Charles H. Gaulden, Self Published, April, 1999.
↑ Virginia colonial militia, 1651-1776, Land Bounty Certficates, p. 31, Baltimore Southern Book Co., 1954.
↑ PRINCE EDWARD WILL BOOK 175 - 1784, by J.C. Kolbe, Vol. 3, p. 179. 
This person was created on 22 September 2010 through the import of PittsPenn_2010-09-21.ged.
WikiTree profile Gaulding-10 created through the import of Edwards Family Tree.ged on May 29, 2011 by Kennon Edwards.
Gauldin-65 was created by Mark Gauldin through the import of Gauldin Family.ged on Nov 1, 2015.
It may be possible to confirm family relationships with John by comparing test results with other carriers of his Y-chromosome or his mother's mitochondrial DNA.
Y-chromosome DNA test-takers in his direct paternal line on WikiTree: