Osborne (24) agreed a two-and-a-half year deal with the Mariners, which will keep him at the club until the summer of 2019.
He came through the ranks at Hednesford Town, going on to make over 200 appearances for the club over a 6 year period. Despite interest from the likes of Notts County, Crewe Alexandra and Crawley Town, Jamey made the move to Redditch United in 2015. Osborne then joined his hometown club, Solihull Moors in the summer of 2016. Following a number of eye-catching performances where he scored 5 goals in 25 league and FA Cup appearances, the highly rated attacking midfielder was subject to reported interest from a number of Football League clubs in the January transfer window.
Regularly considered one of the brightest talents in non-league football, manager Marcus Bignot has given the midfielder his chance to shine in Sky Bet League Two.
Jamey made his GTFC debut against Notts County on 21.01.17.