[1] The league will be contested by 10 teams - nine under-23 sides plus Hound Dogs and began on 8 December 2020.

The Gibraltar Intermediate League was established by the Gibraltar Football Association in June 2018 as a merger of the pre-existing Reserves Division and Under 18 Division, in order to aid player development on the territory.

Competing clubs are required to register a reserve squad of 18 players, of which 13 must be Gibraltarian.

Due to the lack of resources necessary to compete in the new Gibraltar National League, Hound Dogs were granted special permission by the Gibraltar FA to participate as a senior side in the Intermediate League.

Note: Flags indicate national team as has been defined under FIFA eligibility rules.