An　equi-charged　mixture　of　cationic　gemini　surfactant,　C,C′-bis(sodium　dodecyldimethylammonium　bromide)-p-benzenedimethylene　(12-Ph-12),　and　anionic　surfactant,　sodium　laurate　(SL),　can　be　dissolved　in　cyclohexane　to　form　reverse　worm-like　micelles.　The　samples,　with　their　different　surfactant　concentrations　and　water　contents,　were　studied　using　rheological　measurements.　The　minimum　value　of　W0,　the　molar　ratio　of　water　to　total　surfactants,　was　9　for　the　equally　charged　system　of　12-Ph-12　(200 mmol L−1)/SL.　The　maximum　value　of　zero-shear　viscosity　(η0)　of　this　system　was　1858 Pa s−1　at　W0　=　14.　Upon　increasing　the　12-Ph-12　concentration　to　300 mmol L−1,　η0　increased　rapidly　to　2200 Pa s−1.　The　dynamic　rheology　showed　the　typical　visco-elastic　response　of　a　thread-like　micelle　solution　at　12-Ph-12　(200 mmol L−1)　and　W0　=　10,　with　a　relaxation　time　(τR)　of　0.11 s.　At　W0　=　14,　a　characteristic　of　a　surfactant　gel　was　shown,　where　the　elastic　modulus　(G′)　and　the　viscous　modulus　(G″)　were　independent　of　frequency.　Non-linear　visco-elasticity　showed　a　strain-softening　response　at　high　strains.　©　2016,　Springer-Verlag　Berlin　Heidelberg.