MMV030084 is a potent PfPKG inhibitor that displays nanomolar-level activity against liver-stage Plasmodium parasites in HepG2 cells and synchronized schizont stages of both drug-sensitive and multidrug-resistant strains, selectively inhibits male gamete exflagellation, and mechanistically targets cGMP-dependent protein kinase with sub-nanomolar potency in recombinant assays, establishing MMV030084 as a valuable antimalarial lead for multistage lifecycle intervention.