Gullywash is a 5CP map created by Jan "Arnold" Laroy. The map was first posted to the TF2Maps.Net forums on April 9, 2009 and was promptly included in ETF2L 6v6 Season 6 later that year. The map has been a staple in the competitive 6v6 scene since then, and was officially added to the game on October 13, 2011.
Gullywash is well-known for its more closed design; featuring only two entrances (choke and big door) to its middle point as opposed to the more popular three entrances. This can often lead to more stalemates and slower play around the second point. In contrast, Gullywash is notorious for its relatively fast-capping last point featuring a flank route underneath the point known as "water".