He is the first attested member of the Gidos family, which rose to some prominence in the Byzantine Empire at the end of the 12th and the beginning of the 13th centuries.
[1] Alexios Gidos is first mentioned on the occasion of the Norman sack of Thessalonica in 1185, when he held the post of "Grand Domestic of the East", i.e. commander-in-chief of the Byzantine army's forces in Anatolia.
The two generals were heavily defeated at the Battle of Arcadiopolis: most of the Byzantine army, along with Vatatzes, fell, while Gidos managed to escape only with great difficulty.
This in turn led to speculation that there may have been a direct connection with the Gidos family and Guy/Guido, a son of the Norman conqueror of southern Italy, Robert Guiscard, who defected to the Byzantine emperor Alexios I Komnenos (ruled 1081–1118) centuries earlier, entered his service and possibly married into the imperial family.
[5] On the other hand, in his Die byzantinische Aussenpolitik zur Zeit der letzten Komnenenkaiser (1967), W. Hecht cast doubt on their Latin origin, and argued that at any rate, by the time Alexios Gidos appears, the family had been thoroughly Byzantinized and shed their Latin identity.