Last updated on .From the section Irish
McGinn was signed by Glentoran on an 18 month deal.
McGinn fell out of favor with Bowyer and was made available for transfer.
The Glens' Boxing Day defeat by Linfield was attended by the 35-year-old who has 72 caps for Northern Ireland.
McGinn is joining a Glentoran side who are in the top six.
The east Belfast side reached the Irish Cup sixth round on Saturday but have lost their last four Irish Premiership games leaving them 10 points off the pace.
Glentoran will benefit from the absence of McMenamin.
It is believed that McGinn is interested in becoming a coach when he stops working.
McGinn played for Derry City and Celtic during his career in the Irish League.
He played for both Aberdeen and Gwangju in South Korea and helped them win the Scottish League Cup.
Daire O'Connor is a 25-year-old from Scottish Championship side Ayr United.