Cyclin with roles in multiple processes including transcription, meiotic recombination repair, cell cycle regulation, and promotion of normal growth and metabolism (PubMed:18667003, PubMed:18286205, PubMed:21311225, PubMed:22976300, PubMed:25995770, PubMed:26274446). Binds to the promoter region of the homeobox gene Abd-B and is involved in maintaining Abd-B expression in the pupal epithelium (PubMed:18667003, PubMed:18286205). Involved in the transcriptional repression of the homeotic genes Scr and Ubx (PubMed:25995770). Plays a role in meiotic recombination repair of DNA double-strand breaks which ensures efficient translation of grk and promotes grk activity in the oocyte, leading to oocyte dorso-ventral axis formation following secretion of grk from the oocyte and its binding to Egfr in the directly overlying follicle cells (PubMed:23121330, PubMed:22976300). Negatively regulates the binding of serine/threonine-protein kinase Akt1 to the protein phosphatase 2A subunit wdb, promoting normal growth and metabolism (PubMed:26274446). Required for the formation of bilateral symmetry (PubMed:21998598). Negatively regulates cell cycle progression by preventing G1 to S transition and retarding S-phase progression (PubMed:21311225). Interacts with corto (PubMed:18286205). Interacts with the cyclin-dependent kinases Cdk2 and Cdk4 (PubMed:21311225). Interacts with Brca2 and Rad9 (PubMed:22976300). Interacts with polycomb protein Asx (PubMed:25995770). Interacts with protein phosphatase 2A subunit wdb (PubMed:26274446). Localizes mainly on active chromatin. Expressed throughout all stages of the cell cycle (at protein level) (PubMed:21311225). Expressed throughout development with notably less expression in third instar larva than in embryo or adult (PubMed:18286205). Viable but females are sterile and produce eggs with a ventralized phenotype where the dorsal respiratory appendages are fused (PubMed:23121330, PubMed:22976300). Reduced levels of grk protein in the oocyte cytoplasm and very low levels in follicle cells and in the extracellular space separating the oocyte from the follicular epithelium but no effect on grk transcription (PubMed:23121330). Increased incidence of DNA double-strand breaks in mutant germaria (PubMed:22976300). Reduced body size and weight and reduced cell size and number with mutants showing signs of starvation under normal feeding conditions and disturbed fat metabolism marked by elevated levels of stored fat (PubMed:26274446). Reduced phosphorylation levels of Akt1, Thor/4E-BP and S6k (PubMed:26274446). Accumulation of insulin-like peptide Ilp5 in larval brains is reduced to levels comparable to starved control animals (PubMed:26274446). Belongs to the cyclin family. Cyclin G subfamily.