Transparent porous matrices made by the sol-gel method are ideal as hosts for active photo active or electro active organic dopants. Sol-gel optics application are related to an adequate and precise control of the compositional and pore surface variations in the cage of trapped molecules, which is necessary to the preparation of novel optical and electro optical gel-glasses. Gel-glass dispersed liquid crystal (GDLC) with electro optical properties shall be presented as an application of the sol-gel process for trapping micro droplets of nematogenic organic compounds. GDLC films may be used as electro optical devices. Upon application of an external electric field, unaltered GDLCs were made to switch from white opaque to colorless transparent states. The different electro optic features of GDLCs, including GDLC performances for color display applications are reviewed.