This could simply due to diagenesis or it could be a true external zone,[1] which is a third layer present in most bird eggs but is rare in non-avian dinosaurs.

[3][6] Styloolithus, another fossil enantiornithine egg from the Gobi, differs from Gobioolithus in that it is larger and has a thicker eggshell with a proportionately smaller mammillary layer.

[3][7] The distribution of the eggs suggests that they had a long-term colonial nesting site at the Khermeen Tsav locality in the Barun Goyot Formation.

More specifically, the fossils are found in the Barun Goyot and the Djadokhta Formations of the Nemegt Basin, which is dated to the Upper Cretaceous.

[2] In 1991, the Russian paleontologist Konstantin Mikhailov introduced the modern parataxonomic system used to classify fossil eggs.

While he did not give the "Gobipteryx" eggs a formal name under this classification scheme, he did assign them to the prismatic morphotype in the ornithoid basic type.

Following Elżanowski, he referred them to Gobipteryx, though only tentatively because at the time ongoing studies of similar eggs found on the Soviet expeditions cast doubt on this classification.

[3] Two years later, Mikhailov went on to classify these eggs parataxonomically as a new oofamily, Gobioolithidae, containing the single oogenus Gobioolithus, with two oospecies: G. minor and G. major, corresponding to G1 and G2, respectively.

[2] In 2013, Kurochkin, Chatterjee, and Mikhailov described a new genus and species of bird, Gobipipus reshetovi, based on the embryos within Gobioolithus eggs.

[7] In 2015, some of the larger egg specimens previously assigned to G. major were moved into their own new oogenus and oospecies, Styloolithus sabathi.