The way wound recovery is calculated starts by giving each wounded gal a number of 'recovery days' immediately after a mission. Then at midnight, each base recovers 1 day baseline for each gal assigned to it, including those in transit, plus any bonus recovery days from facilities. So sending a wounded gal from a outpost without a recovery facility to a base that does will speed up the recovery.
Note that transferring doesn't change the number of recovery days the gal has left, just the number removed per each 'real' day.