Gypsum based composites are widely used in building construction because of their low cost, easy manufacture and many benefits for house living conditions. The wall panels are solid and can be used as load bearing walls. The materials to be used for the panel are gypsum, white cement, glass fibre, and sisal fibre. Gypsum has been widely used in the field of construction engineering due to low energy consumption, cost effective, good fire resistance, thermal and sound isolation properties etc. White cement is a cement with a high tricalcium aluminate content and almost no tetra calcium alumina ferrite. The white cement mortars showed 7% greater tensile strength and 25% greater compression strength than the grey cement mortars. Roving Glass Fibre commercially available E glass fibres can be used to reinforce the gypsum plaster matrix and produce a strong composite material having improved tensile and impact properties. Incorporation of glass fibre increases the mechanical, thermal and water resistance properties. Sisal Fibre is a natural fibre of Agavaceae (Agave) family that yields a stiff fibre, traditionally used in making twine and rope. The advantages of natural fibre composites include lightweight, low-energy production and environmental friendly. Several series of gypsum composites by weight substitution of gypsum with a 1.5% weight of glass fibre and 1% of sisal fibre with proportions such as 20% of white cement are developed and the mechanical properties are to be tested. The axial and shear capacities of gypsum composite wall panel have to be obtained from the experimental tests. The simplified analytical model is verified using the results of ANSYS analysis with materials and properties typical of those used in the building. The results are compared with the experimental results of the test conducted, and results from the model analysis.