Extraction in terms of selectively extracting either glucose or fructose from the syrup is going to be difficult to impossible, at least as far as achieving any reasonable degree of purity is concerned. The glucose-fructose separation method preferred by Dow Chemical is called ligand exchange chromatography. According to this publication:
Unlike the macroporous structure of DOWEX™ resins used in deashing,
DOWEX MONOSPHERE™ 99 separation resins are gel beads which have a
smooth, uniform surface. While macroporous resins are opaque, gel
resins are translucent. Chromatographic separation resins are
functionalized and the beads contain a significant amount of water.
While going through the column sections, the sugars to be separated
dissolve in the water contained within the beads. Inside the bead,
the dissolved sugars interact with the calcium ions held by the resin.
Fructose, glucose and water form weak ligand complexes with the
calcium ion. A stronger interaction in the fructose/calcium ion
complex than in the glucose/calcium ion complex is the basis of the
mechanism of separation of fructose from glucose.
As this is a readily available commercial product designed for use on massive scales, constructing a simple separation column based on these separation resins as described in the publication above should be a very doable, cost-effective approach to your problem.