Complex sentence: The GFA's main competition is the Island Games, which is held every two years where they compete against teams such as Isle Of Man, Isle Of White, Guernsey and Gotland to name a few.
Split into simpler sentences: The GFA's main competition is the Island Games which is held every two years. Here, Gibraltar competes against teams from the Isle Of Man, the Isle Of Wight, Guernsey and Gotland to name a few.