The GWB105 is a five string solid body electric bass model introduced by Ibanez for 2005. It is a signature model for American jazz fusion bassist Gary Willis. It was produced in South Korea.
The GWB105 features an SR series double-cutaway light ash body bolted to a maple neck with a fretless ebony fingerboard with offset white dot position markers. Components include a custom Bartolini passive soapbar bass pickup with a Bartolini preamp with a two-band EQ, an Accu-cast B105 bridge with 16.5mm string spacing, a removable finger rest/ramp, a plastic nut and Gotoh tuners with custom Sure Grip buttons.
The GWB105 was offered only in 2005. The similar GWB1005, which is made in Japan, replaced it for 2006.