Striker Oakley, 24, netted eight times in 31 games over an 18-month spell.

Cypriot defender Gogic, 26, said in a tweeted statement the "next chapter of my career is unclear" after four years with Hamilton.

Oakley's English compatriot McGowan, 23, deciding not to renew his contract but goalkeeper Kyle Gourlay, 21, has signed a new deal until 2021.

Full-back McGowan said on Twitter on Tuesday: "The time is right now to move onto something new."

Thirteen other players' deals are due to expire at Accies.