Rangers have been linked with the Rennes defender Mexer in the recent weeks.
Apparently, the highly experienced centre back will be a free agent at the end of this season and Rangers are looking to snap him up on a free transfer.
Gerrard has already signed the likes of Hastie, Jones and Davis on free transfers and he is looking to add more depth to his side.
Mexer is a regular starter for Rennes and he will surely improve Rangers at the back.
The Ibrox outfit have some good defenders in Goldson and Katic but they need to add some depth and experience as well.