The GRX40 is an RX series solid body electric guitar model introduced by Ibanez in 2000. It is part of the entry-level GIO line. It was also sold as part of the GRX40J, IJX40 and IJS40Jumpstart packages which also contain a practice amp and various accessories.
The GRX40 features a solid body mated to a maple neck with a 22-fret rosewood fingerboard with dot inlays. Components include Ibanez pickups in and HSS configuration and a six-screw synchronized tremolo bridge.
In mid-2017 a new fretboard material, treated New Zealand pine, replaced rosewood.
It was produced simultaneously in China and in Indonesia; as such, multiple versions of this guitar exist for the different markets. For example, guitars sold in Asia since 2015 are equipped with the FAT-6 tremolo while those sold in other markets have the "standard tremolo". Starting in 2018 the GRX40 sold in the US market has a T106 tremolo. For 2019 the T106 tremolo was used in GRX40s sold worldwide. For 2020 the fretboard was changed to jatoba.
This same model is also known as the GRX40A in Japan and the GRX40Z in the USA. The GRX45 is a similar model without a pickguard.