The trio was signed by former manager Ronnie Jepson last summer, but didn't feature in Mark Stimson's first team plans.
Facey played thirty-two times for The Gills last season, but only managed to find the net three times. Facey was then sent out on loan to Wycombe Wanderers towards the end of last season and has spoken of his hope of a permanent switch to Adams Park.
Sodje made thirteen appearances for The Gills last season, and failed to force his way back into The Gills side after a serious head injury he sustained at Yeovil's Huish Park last season. Sodje also went out on loan to League Two at Bury
Brown made eleven appearances for Gillingham, and struggled to make Mark Stimson's first team plans.
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