Denagan mengambil kira istilah ini, sesetengah ahli astronomi mula merujuk kepada Uranus dan Neptun sebagai "gergasi ais", untuk menunjukkan dominasi "ais" (dalam keadaaan cecair) dalam komposisi bahagian dalaman.
Extrasolar gas giants==
Because of the techniques currently available to detect [[extrasolar planet]]s, all of those found to date have been of a scale associated in the Solar system to gas giants. The smallest found as of September 2004 is comparable in mass to Neptune, and many have masses several times that of Jupiter. Many of the extrasolar planets are much closer to their parent stars and hence much hotter than gas giants in the solar system, making it possible that some of those planets are a type not observed in the solar system. Considering the relative abundances of the elements in the universe (approximately 90% hydrogen), it would be surprising to find a predominantly rocky planet more massive than Jupiter. On the other hand, previous models of planetary system formation suggested that gas giants would be inhibited from forming as close to their stars as have many of the new planets that have been observed.
[[Image:Géantes gazeuses (1 px = 1000 km).jpg|thumb|center|550px|The solar system's four gas giants against the Sun's limb, to scale]]