NOVELTY - A curable perfluoropolyether-based gel composition comprises linear fluorinated polymer (A) (I) containing 2 or more alkenyl groups in a molecule, polyfluoromonoalkenyl compound (B) containing one alkenyl group in a molecule and having a perfluoropolyether structure in the backbone, cyclic organohydrogenpolysiloxane (C) (II) containing 2 or more silicon-bonded hydrogen atoms and one or more perfluoroalkyl group or perfluoropolyether structure-containing group in a molecule, and hydrosilylation reaction catalyst (D).    USE - Curable perfluoropolyether-based gel composition is used for forming gel product used for automobile, chemical plant, inkjet printer, semiconductor fabrication line, analyzer, scientific instrument, medical instrument, aircraft, and fuel cell (all claimed).    ADVANTAGE - The curable perfluoropolyether-based gel composition provides gel product with excellent heat resistance, solvent resistance, chemical resistance, weatherability, parting property, and water/oil repellency.    DETAILED DESCRIPTION - A curable perfluoropolyether-based gel composition comprises linear fluorinated polymer (A) of formula (I) containing 2 or more alkenyl groups in a molecule, polyfluoromonoalkenyl compound (B) containing one alkenyl group in a molecule and having a perfluoropolyether structure in the backbone, cyclic organohydrogenpolysiloxane (C) of formula (II) containing 2 or more silicon-bonded hydrogen atoms and one or more perfluoroalkyl group or perfluoropolyether structure-containing group in a molecule, and hydrosilylation reaction catalyst (D).    R1=vinyl or 1-4C alkyl;    R2=1-6C alkylene;    R3=H or 1-4C fluoroalkyl;    Rf1=perfluoroalkylenyl or divalent perfluoropolyether structure-containing group;    Rf2=perfluoroalkyl or monovalent perfluoropolyether structure-containing group;    R4=1-20C monovalent hydrocarbyl;    R5=2-20C divalent hydrocarbyl containing ether bond, amide bond, carbonyl bond, silyl radical or ester bond;    k=2-4;    l=1-3;and    k+l=5.    An INDEPENDENT CLAIM is included for gel product, which contains a cured mass of the curable perfluoropolyether-based gel composition.