The airport is in competition with Heathrow to win approval for an additional runway.
One of the guarantees is compensation for people living close to the airport.
Gatwick's chairman Sir Roy McNulty said: "These guarantees would mean Gatwick takes on the main risks of building the new runway."
The Airports Commission is currently considering three options for expanding airport provision in south-east England and is due to publish its findings in the summer.
These options are a third runway at Heathrow, lengthening an existing runway at Heathrow or a second runway at Gatwick.
Gatwick has "guaranteed" the project would be privately funded with no need for public subsidy, that airport charges would be capped and it would bear the main risks of the expansion plan.
It has also promised to compensate residents by Â£1,000 towards council tax bills if they are affected by significant level of aircraft noise, and said it would ensure that air quality targets always were always met.

The 25-year-old joined the Blues from Reading in August 2015 but has yet to make his debut for the Premier League champions.
He was loaned back to the Royals in 2015-16 before spending last season with German side Eintracht Frankfurt.
Hector has also had spells with five non-league sides, as well as spells in Republic of Ireland and Scotland.
The Jamaica international has played for Bracknell Town, Didcot Town, Havant and Waterlooville, Oxford City, Horsham, Dundalk, Barnet, Shrewsbury, Aldershot, Cheltenham, Aberdeen, Reading and Frankfurt.
He could make his Tigers debut against Aston Villa on Saturday, 6 August.
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Bosses at Gatwick Airport have unveiled five "guarantees" they hope will convince the Airports Commission to approve a second runway.
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Chelsea defender Michael Hector has joined Hull City on a season-long loan, the 14th loan spell of his career.