GFI System is a boutique guitar effects pedal company based in Jakarta, Indonesia, founded in 2010 by Henry Widjaja along with Yonas Darja and Jesse Darja. The company began with a Tube Screamer–style overdrive before pivoting toward DSP-driven designs that have come to define its catalog. Operating under the legal name PT Gema Fajar Inovasi, the small team designs and builds its pedals in-house.

The brand is best known for ambient and modulation effects built around custom DSP engines with deep editability. Notable releases include the Specular Reverb, the Specular Tempus reverb/delay, the Synesthesia dual-engine modulation pedal, the Cabzeus stereo speaker simulator, the Enieqma EQ, the Duophony dual-channel router, the Skylar reverb, and the Orca delay. GFI System has built a reputation among players for offering studio-grade processing and dual-engine flexibility in compact enclosures, often at price points below comparable boutique offerings from Western manufacturers.

GFI System has 1 product cataloged on Equipboard, including Headphone Guitar Amplifiers. Their gear is featured by 2 artists, with the strongest followings in Rock, Pop, and Blues. Notable users include R.J. Ronquillo and Joji Malani.