if I attain turiya state, do gods exist on that loka or not? because I do know that turiya is unmanifested state and we're indiffrent from Narayana/Purusha and we're very himself in turiya, and gods didn't exist till purushamedha yajna was performed and purusha was offered as main sacrifice, and from that sacrifice everything including gods came into being.
You are confusing the turiya state with the manifestation of Devatas. Turiya is a state beyond the waking, dream and dreamless sleep state.
Thou liest in the Cosmic Waters in the state of Turiya, which is neither absorption in the oblivion of deep sleep, nor involvement in the objective movement of the waking and dream states.
Srimad Bhagavata Purana VII.9.30
Devatas and for that matter the entire universe with its 14 lokas and jivas are manifestations of Brahman. Devatas and Jivas can be in the turiya state but one must not mix up the lokas with the Turiya state.