Biocomposite-based hydrogels have engrossed snowballing devotion due to their hydrophilic, biodegradability, and biocompatibility properties. 3D printing of biocomposite-based hydrogels has emerged in numerous fields, such as pharmaceutical, biomedical, and food engineering, as it involves fabricating complex and customized geometrical components. The present works focus on developing new 3D printable biocomposite hydrogels using gelatin, polyvinyl alcohol, guar gum, and hydroxypropyl methylcellulose (HMC). Hydroxyapatite (HAp) and SiO2 nanoparticles are used as supplemental materials to tailor the properties of hydrogels. The composition has been optimized for enhanced printability through rheological characterization. The developed hydrogel, chemically cross-linked with glyoxal, has been assessed for its static and dynamic mechanical properties, swelling, thermal stability, and degradation characteristics. By incorporating supplements such as HAp, HMC, and SiO2 into the gelatin/polyvinyl alcohol (PVA)/guar gum hydrogel, a compressive and tensile strength of 4.64 MPa, and 71.76 kPa was achieved with better recovery efficiency under cyclic compression and tensile tests. The highest storage modulus of 0.6 MPa at 100 Hz was noticed. A sorbing capacity of 208.98 % was perceived in 70 h. The hydrogel demonstrated quick creep recovery and stress relaxation properties with faster degradation behavior than the PVA hydrogel. Based on the outcomes attained in the present study, it is inferred that the reported biocomposite hydrogels are promising materials for pharmaceutical and biomedical applications.